diff -u b/core/modules/text/src/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php b/core/modules/text/src/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php
--- b/core/modules/text/src/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php
+++ b/core/modules/text/src/Plugin/Field/FieldFormatter/TextTrimmedFormatter.php
@@ -34,9 +34,10 @@
    */
   public static function defaultSettings() {
     return [
-      'wordsafe' => FALSE,
-      'add_elipsis' => FALSE,
+      'add_ellipsis' => FALSE,
+      'min_wordsafe_length' => 1,
       'trim_length' => '600',
+      'wordsafe' => FALSE,
     ] + parent::defaultSettings();
   }
 
@@ -44,18 +45,6 @@
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $element['wordsafe'] = [
-      '#title' => t('Wordsafe'),
-      '#type' => 'checkbox',
-      '#default_value' => $this->getSetting('wordsafe'),
-      '#description' => t('Trim on word boundaries.'),
-    ];
-    $element['add_elipsis'] = [
-      '#title' => t('Add elipsis'),
-      '#type' => 'checkbox',
-      '#default_value' => $this->getSetting('add_elipsis'),
-      '#description' => t('Displays an elipsis after trimmed text.'),
-    ];
     $element['trim_length'] = [
       '#title' => t('Trimmed limit'),
       '#type' => 'number',
@@ -65,6 +54,33 @@
       '#min' => 1,
       '#required' => TRUE,
     ];
+    $element['add_ellipsis'] = [
+      '#title' => t('Add ellipsis'),
+      '#type' => 'checkbox',
+      '#default_value' => $this->getSetting('add_ellipsis'),
+      '#description' => t('Displays an ellipsis after trimmed text.'),
+    ];
+    $element['wordsafe'] = [
+      '#title' => t('Wordsafe'),
+      '#type' => 'checkbox',
+      '#default_value' => $this->getSetting('wordsafe'),
+      '#description' => t('Trim on word boundaries.'),
+    ];
+    $field_name = $this->fieldDefinition->getName();
+    $field_wordsafe_selector = "fields[$field_name][settings_edit_form][settings][wordsafe]";
+    $element['min_wordsafe_length'] = [
+      '#title' => t('Minimum acceptable length for truncation'),
+      '#type' => 'number',
+      '#field_suffix' => t('characters'),
+      '#default_value' => $this->getSetting('min_wordsafe_length'),
+      '#min' => 1,
+      '#description' => t('The minimum acceptable length for truncation, if wordsafe is TRUE.'),
+      '#states' => [
+        'invisible' => [
+          'input[name="'. $field_wordsafe_selector . '"]' => ['checked' => FALSE],
+        ],
+      ],
+    ];
     return $element;
   }
 
@@ -73,9 +89,16 @@
    */
   public function settingsSummary() {
     $summary = [];
-    $summary[] = t('Wordsafe: @wordsafe', ['@wordsafe' => $this->getSetting('wordsafe') ? 'true' : 'false']);
-    $summary[] = t('Add elipsis: @add_elipsis', ['@add_elipsis' => $this->getSetting('add_elipsis') ? 'true' : 'false']);
     $summary[] = t('Trimmed limit: @trim_length characters', ['@trim_length' => $this->getSetting('trim_length')]);
+    if ($this->getSetting('wordsafe')) {
+      $summary[] = t(
+        'Truncating on a word boundary, with a minimum of @length characters',
+        ['@length' => $this->getSetting('min_wordsafe_length')]
+      );
+    }
+    if ($this->getSetting('add_ellipsis')) {
+      $summary[] = t('Ellipsis add to the end of the truncated string');
+    }
     return $summary;
   }
 
@@ -91,12 +114,11 @@
       $element += \Drupal::service('element_info')->getInfo($element['#type']);
       // Add the #pre_render callback that renders the text into a summary.
       $element['#pre_render'][] = [TextTrimmedFormatter::class, 'preRenderSummary'];
-      // Pass on the trim length to the #pre_render callback via a property.
+      // Pass on default settings to the #pre_render callback via a property.
       $element['#text_summary_trim_length'] = $this->getSetting('trim_length');
-      // Pass on the wordsafe configuration:
-      $element['#wordsafe'] = $this->getSetting('wordsafe');
-      // Pass on the add_elipsis configuration:
-      $element['#add_elipsis'] = $this->getSetting('add_elipsis');
+      $element['#text_summary_wordsafe'] = $this->getSetting('wordsafe');
+      $element['#text_summary_add_ellipsis'] = $this->getSetting('add_ellipsis');
+      $element['#text_summary_min_wordsafe_length'] = $this->getSetting('min_wordsafe_length');
     };
 
     // The ProcessedText element already handles cache context & tag bubbling.
@@ -132,6 +154,15 @@
    *     filter_fallback_format().
    *   - #text_summary_trim_length: the desired character length of the summary
    *     (used by text_summary())
+   *   - #text_summary_wordsafe: If TRUE, attempt to truncate on a word
+   *     boundary.
+   *     (used by text_summary())
+   *   - #text_summary_add_ellipsis: If TRUE, add '...' to the end of the
+   *     truncated string.
+   *     (used by text_summary())
+   *   - #text_summary_min_wordsafe_length: the minimum acceptable length
+   *     for truncation
+   *     (used by text_summary())
    *
    * @return array
    *   The passed-in element with the filtered text in '#markup' trimmed.
@@ -140,7 +171,14 @@
    * @see text_summary()
    */
   public static function preRenderSummary(array $element) {
-    $element['#markup'] = text_summary($element['#markup'], $element['#format'], $element['#text_summary_trim_length'], $element['#wordsafe'], $element['#add_elipsis']);
+    $element['#markup'] = text_summary(
+      $element['#markup'],
+      $element['#format'],
+      $element['#text_summary_trim_length'],
+      $element['#text_summary_wordsafe'],
+      $element['#text_summary_add_ellipsis'],
+      $element['#text_summary_min_wordsafe_length']
+    );
     return $element;
   }
 
diff -u b/core/modules/text/text.module b/core/modules/text/text.module
--- b/core/modules/text/text.module
+++ b/core/modules/text/text.module
@@ -56,11 +56,17 @@
  * @param $size
  *   The desired character length of the summary. If omitted, the default value
  *   will be used. Ignored if the special delimiter is present in $text.
+ * @param bool $wordsafe
+ *   If TRUE, attempt to truncate on a word boundary.
+ * @param bool $add_ellipsis
+ *   If TRUE, add '...' to the end of the truncated string.
+ * @param int $min_wordsafe_length
+ *   If $wordsafe is TRUE, the minimum acceptable length for truncation.
  *
  * @return
  *   The generated summary.
  */
-function text_summary($text, $format = NULL, $size = NULL, $wordsafe = FALSE, $add_elipsis = FALSE) {
+function text_summary($text, $format = NULL, $size = NULL, $wordsafe = FALSE, $add_ellipsis = FALSE, $min_wordsafe_length = 1) {
 
   if (!isset($size)) {
     $size = \Drupal::config('text.settings')->get('default_summary_length');
@@ -99,7 +105,7 @@
   // sentence boundaries.
 
   // The summary may not be longer than maximum length specified. Initial slice.
-  $summary = Unicode::truncate($text, $size, $wordsafe, $add_elipsis);
+  $summary = Unicode::truncate($text, $size, $wordsafe, $add_ellipsis, $min_wordsafe_length);
 
   // Store the actual length of the UTF8 string -- which might not be the same
   // as $size.