μὴ ἐν πολλοῖς ὀλίγα λέγε, ἀλλ΄ ἐν ὀλίγοις πολλά → don't say little in many words, but much in a few words (Stobaeus quoting Pythagoras)
P. θυμοειδής; see bold.
vigorous: P. and V. νεανικός.
energetic: P. σφοδρός.