iecan

Old English

From Proto-West Germanic *aukijan (“to increase”), equivalent to ēaca +‎ -an. Related to Proto-Germanic *aukaną (“to increase”) and Latin augeō.

īeċan (transitive)

to increase or enlarge
- 10th century, Exeter Book Riddle 30‎^[1]:
  Þonne iċ mec onhebbe ond hī onhnīgaþ tō mē, moniġe mid miltse, þǣr iċ monnum sceal īċan upcyme ēadiġnesse.
  When I raise myself up and they bow down to me, many with mercy, then I shall increase rising of happiness for men.
to add
to endow
to impregnate

Conjugation of īeċan (weak class 1)