/ˈpesɪmɪzəm ||; ˈpɛsəˌmɪzəm/noun [U] pessimism (about/over sth) the state of expecting or believing that bad things will happen and that sth will not be successful 悲观 [OPP] optimism 反义词为optimism➔pessimistic /ˌpesɪˈmɪstɪk ||; ˌpɛsəˈmɪstɪk/ adj [OPP] optimistic 反义词为optimistic➔pessimistically /-kli ||; -klɪ/ adv [OPP] optimistically 反义词为optimistically