ἐν τῷ θέρει τὴν χλαῖναν κατατρίβων → wearing out one's cloak in summertime
assume as a basis: P. ὑπολαμβάνειν, ὑποτίθεσθαι, τιθέναι, (or mid.).
be posited: P. ὑπάρχειν, ὑποκεῖσθαι, V. ὑπεῖναι.