LingakuFrequency rank: 36,082. – 36,518.
- tight-lipped; able to keep a secretsee also 口の堅いantonym: 口が軽い
expressions (phrases, clauses, etc.); adjective (keiyoushi)
Forms
- 口が堅い【くちがかたい】Frequency rank: 36,082. – 36,518.
- 口が固い【くちがかたい】Frequency rank: 43,061. – 43,772.
- 口がかたい【くちがかたい】
- くちがかたい
Wiktionary definitions (experimental)