strengthens the prefixed adjective or adjectival noun

one who does the previous word's action: -ist, -er / (board games) counter for moves in shogi, go, etc.

hand / handicraft, skill, talent / one who does an action: -ist, -er / handwork

hand

(criminology, law) criminal act, criminal offense

capacity, competence

(euphemistic) actual sex acts / (euphemistic) unsimulated sex

to explore someone else's opinion, to sound out

(idiomatic) to fire up, to psych up, to motivate

(idiomatic) to keep in mind