習性|しゅうせいshuusei[0]heiban (flat)

1. nounhabit
   清潔せいけつは日本人にほんじんの習性しゅうせいだ。↗

   Cleanliness is proper to the Japanese.
2. nounbehavior; behaviour; trait; nature

• Related気質きしつNeutralRefers to human temperament, as in 「職人気質」 (read 「かたぎ」), the disposition typical of a certain type of person; 「習性」 mainly covers animals or traits acquired through habit.
• Related性向せいこうWrittenA tendency of one's nature — character or behavior — as in the economic term 「消費性向」; formal, mostly academic. 「習性」 stresses behavior fixed by habit or innate to animals.

Use 「習性」 for the behavior traits of animals or tendencies formed by habit, as in 「鮭の習性」. For a person's temperament say 「気質」; for a tendency, 「性向」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 習慣しゅうかんによって身みに付ついた性質せいしつ。
2. ある種しゅの動物どうぶつの行動こうどうの特性とくせい。