/kə'prɪʃəs/ a. Syn. unpredictable; fickle; arbitrary (反复无常的) fickle; impulsive and unpredictable; apt to change opinions suddenly The storm was capricious: it changed course constantly.
/'koʊdʒənt/ a. Syn. convincing (有说服力的) reasonable and convincing; based on evidence; forcefully persuasive It was inevitable that David chose to go to Harvard: he had several cogent reasons for doing so, including a full-tuition scholarship.