noun
ADJECTIVE
▪ sheer
▪ strong
▪ all sb's
▪
It took all his ~ to stay in and study.
VERB + WILLPOWER
▪ have
▪
I'm no good at losing weight. The trouble is, I've no ~.
▪ take
▪ summon
▪
He tried to summon the ~ to get out of bed.
PREPOSITION
▪ by ~
▪
She managed to finish the race by sheer ~.