難しい, むずかしい, むつかしい
Antonym: 易しい
1. difficult, hard, troublesome, complicated, serious (disease, problem, etc.)
euphemistic
2. impossible, unfeasible
3. fussy, particular, fastidious, hard to please, displeased
4. gloomy, glum, sullen, serious (look)
Archaism
5. dirty, unclean, filthy, detestable
私は彼女に難しい質問をした。