1.
impossible, not possible
Cannot be done or achieved.
不可能ではない。
It's not impossible.
実現不可とされていた計画。
A plan that was considered impossible.
現状では不可だ。
It's not possible in the current situation.
2.
wrong, improper
Not acceptable or appropriate.
撮影不可。
No photography allowed.
Common sign
持ち込み不可。
No outside items allowed.
飲食不可のエリア。
An area where eating and drinking are not allowed.
3.
failing grade
An academic grade indicating failure.
成績が不可だった。
The grade was a fail.
試験で不可を取った。
I got a failing grade on the exam.
不可が二つあると留年する。
If you get two failing grades, you repeat the year.
不可 means impossible, wrong, or failing.
COMMON COMPOUNDS:
- 不可能: impossible
- 不可欠: indispensable
- 不可解: incomprehensible
- 不可避: unavoidable
USAGE:
- Often seen in signs: 〜不可 (~ not allowed)
- Academic grading: 不可 = F (failing)
GRADING SCALE:
- 優/秀: A, 良: B, 可: C, 不可: F