optimistic/ˌɒptɪ'mɪstɪk $ ˌɑːp-/

a. believing that good things will happen

a. 乐观的：[optimistic about sth] He's very optimistic about the company's future. 他对公司的未来很乐观。

◇[optimistic (that) ...] I'm optimistic that an agreement will be reached. 我对能否达成一致意见很乐观。

音组-istic/-'ɪstɪk/

characteristic; optimistic