一番
JLPT N5:most / -est
Means "the most": the highest in a group.
How to form it
- Put 一番 right before the adjective, or before 好き: 一番高い (the tallest), 一番好き (like best).
- Mark the group with で, or with の中で: 日本で一番高い山 (the tallest mountain in Japan), 果物の中で (of all fruit).
- Ask with a question word + が: 何が一番好きですか (what do you like best?).
Examples
富士山は日本で一番高い山です。
Mt Fuji is the tallest mountain in Japan.
この店が一番おいしいです。
This restaurant is the best.