笃定 dǔdìng certain Definitions Defs Origin Strokes Stroke Words Sentences Sents dǔdìng certain · certainly 笃 篤 dǔ sincere (bound form) sincere; genuine; earnest; honest and kind定 dìng adverbauxiliary surely surely; certainly; definitelydǔdìng calm 笃 篤 dǔ sincere (bound form) sincere; genuine; earnest; honest and kind定 dìng verbadjective calm (bound form) to become calm; to stabilize or compose one's minddǔdìng steadfast 笃 篤 dǔ sincere (bound form) sincere; genuine; earnest; honest and kind定 dìng particleverb fixed (bound form) stable; settled; already agreed upon or established by rule