ἐγγυάω ἐγγύη the forms ἐν-εγύων, ἐν-εγύησα, ἐγ-γεγύηκα (as if the Verb were a compd. with prep. ἐν or ἐγ) are erroneous:
I.to give or hand over as a pledge, Lat. spondere, and in Mid. to have a thing pledged to one, accept as a surety, Od., Plat.
2.of a father to give his daughter in marriage, to plight, betroth, Hdt., Eur.:—Mid. to have a woman betrothed to one, Dem.
II.Mid. also to pledge oneself, give security, Plat., etc.: c. acc. et inf. fut. to promise or engage that . . , Ar., Xen.
2.c. acc. rei, to answer for, Dem.