最さい善ぜんを尽つくすConjugationMeanings1expression, godan verb (-su)do one's best; do something to the best of one's abilityA set phrase meaning to put forth maximum effort, often used in formal or earnest contexts.試し験けんでは最さい善ぜんを尽つくすつもりです。I intend to do my best on the exam.彼かれはいつも最さい善ぜんを