enlengthen

From en- +‎ lengthen; see en- (“intensifying prefix”).

• (Received Pronunciation) IPA^(key): /ɛnˈlɛŋθə̆n/

enlengthen (third-person singular simple present enlengthens, present participle enlengthening, simple past and past participle enlengthened)

1. (ambitransitive) To lengthen: to render or become longer.

   Synonyms: elongate; see also Thesaurus:lengthen

   Hypernyms: enlarge; embiggen (humorous)

   Coordinate terms: widen, enwiden; thicken

   • 1971, Arun Mukhopadhyay et al, Agricultural Extension: A Field Study, page 6:

     However, recent trends in mortality and changes in social attitudes tend to depress the proportion of widows, enlengthen the exposure period […]