cool hand (adjective) fearless: brave, unafraid
Sinonime: continue, drive home, drub into,
drudge, drum into,
endeavor, grind into,
grind*, impress upon, instruct, keep on, peg away,
persevere,
persist, plug away, pound away,
repeat, stick to, try hard, try repeatedly,
workAntonime: afraid,
apprehensive,
fearful,
timid