τὸ πλῆθος οὐκ εὐαρίθμητον ἦν → the crowd wasn't easy to count, the crowd was not small, it was not a small crowd
P. σφοδρός, P. and V. θερμός.
eager: P. and V. ἔντονος, σύντονος, ὀξύς; see eager.
vigorous: P. and V. νεανικός; see vigorous.
