na-adjective, noun which may take the genitive case particle 'no', noun
weak-willed; lacking willpower
Describes a person who lacks determination, patience, or resolve; often used in self-help or psychological contexts.
He is weak-willed and easily gives in to temptation.
意志薄弱な人は、目標を達成するのが難しい。
People who lack willpower find it hard to achieve their goals.