measure word, noun, pronoun, numeral · measure word for long thin things, barriers, exam questions, or courses in a meal

最后一道数学题很难。

verb · to say, state, or express (often used to introduce a quote or polite words)

他在临别之际，轻声向我道了一句晚安。

noun, particle · an abstract way, reason, logic, or moral principle

养生之道在于规律的作息和适度的运动。

noun, particle, measure word · a physical road, path, or way

这条道通往山顶。

noun, abbreviation · the fundamental philosophical or religious concept of the Way in Daoism

道法自然。

noun · a specialized skill, art, or field of study

他精通棋道。

measure word · an administrative division used in historical China

唐代将全国分为十道。

verb · referring to one's moral beliefs, truth, or the cause of righteousness for which one acts or dies.

古人云：“朝闻道，夕死可矣。”