simple past tense and past participle of lengthen

plural of lengthener

A person or thing that lengthens something

plural of lengthening

(transitive) To make longer, to extend the length of. / (intransitive) To become longer.

present participle of lengthen

The process of making or growing longer. / (phonology) a type of sound change when a sound (especially a vowel) lengthens

Third-person singular simple present indicative form of lengthen

That may be lengthened.

simple past tense and past participle of compensatorily lengthen