I.to make fat, fatten, Eur.; π. χθόνα to fatten the soil, of a dead man, Aesch.:—Pass. to be or become fat, Plat., etc.
II.metaph.,
1.to increase, enlarge, πλοῦτον Pind.
2.to make wanton, excite, Aesch.: —Pass. to wax fat and wanton, id=Aesch.; ἔχθεσιν πιαίνεσθαι to batten on quarrels, Pind.