Top matchくち口kuchi がgaかた堅kata いiExpressions (phrases, clauses, etc.), I-adjective (keiyoushi)tight-lipped; able to keep a secretsee 口の堅い彼は口が堅い。He is a tight-lipped man.Also written 口が固い【くちがかたい】kuchigakatai Listen Conjugations Pitch on OJAD Explore