- Japanese Word of The Day
- Posts
- Japanese word of the day: 深い (Fukai)
Japanese word of the day: 深い (Fukai)
Going far beyond the surface

What does 深い (Fukai) mean?
深い (Fukai) (い-adjective) – Deep; profound; intense. This word is used to describe physical depth, like deep water or a deep hole, as well as abstract depth, such as deep thoughts, feelings, or relationships.
Kanji details for 深
Character: 深 (deep)
Radical: 水 (water)
Example sentences with 深い (Fukai)
この川はとても深いです。
(Kono kawa wa totemo fukai desu.)
🌊 This river is very deep.彼の考えは深いです。
(Kare no kangae wa fukai desu.)
💭 His thoughts are profound.深い森の中に入りました。
(Fukai mori no naka ni hairimashita.)
🌲 I entered the deep forest.

深い (Fukai) in context
深い is a versatile adjective that describes both physical and metaphorical depth. You’ll use it for describing deep water, holes, or forests, as well as deep emotions, thoughts, or relationships. It’s a word that conveys going beyond the surface to something more significant or intense.
A quick tip: When talking about deep water or physical depth, 深い is straightforward. For abstract uses, it often pairs with words like 思考 (shikō, thought) or 友情 (yūjō, friendship).
Whether you’re exploring nature or reflecting on meaningful connections, 深い is the word that captures depth in Japanese.
See you tomorrow with a new Japanese word!
—Teacher Víctor