weak verb

noun4

1. •
   One of a class of verbs which use a dental suffix appended to the stem to indicate the past tense.

   • A Weak Verb adds d, ed, or t, to the Present Tense, to make the Past Tense; as, invite, invited; betray, betrayed; step, stept. — 1866
2. •
   A regular verb of this class (thus excluding verbs that do have a dental suffix, but show some formal peculiarity, as in tell > told).

   • Storage clearly is assumed for irregular verb forms. But what about regular or weak verb forms? — 1998
3. •
   A member of a verb class that is customarily called “weak”, and usually distinguished from another class called “strong”.
4. •
   A verb formed from a root that includes a semivowel or another consonant prone to elision (so-called “weak roots”).

   • Three basic root consonant classes exist: the strong verb, roots with weak initial root consonant (I-weak verbs), roots with weak final consonants (III-weak verbs), and a composite class... — 2009