to argue with someone, particularly over the ownership of something, facts, etc.
争う, 異議を唱える
to complain quietly or softly, often in a way that others cannot hear or understand
ぼやく, 愚痴る
to express one's discontent or dissatisfaction in an annoying manner
泣き言を言う, 不平を言う
to spread bad and awful commentaries about someone in order to damage their reputation
中傷する, 誹謗する
to severely criticize or scold someone for their actions or behaviors
叱責する, 非難する
to criticize or speak unfavorably about someone or something, often in an unfair or unkind way.
悪口を言う, 中傷する
to tell a person that one admires something about them such as achievements, appearance, etc.
褒める, 賛辞を述べる
to support or defend something that is believed to be right so it continues to last
支持する, 擁護する
to criticize someone for their actions or behavior, often implying a need for correction
叱責する, 非難する
to strongly and sincerely state that a particular statement or belief is true
確認する, 断言する
to confirm or prove the the accuracy, authencity, or effectiveness of something
検証する, 確認する