consistency between words and actions; acting in accordance with what one says.
上司は部下の前で言行一致の姿勢を示すべきだ。
A boss should demonstrate consistency between words and actions in front of subordinates.
彼は言行一致の人で、約束したことは必ず守る。
He is a person of words and deeds; he always keeps his promises.
政治家には言行一致が強く求められる。
Politicians are strongly expected to align their actions with their words.