痛快 (tòng kuài) means “delighted; to one's heart's content; straightforward; also pr. [tòng kuai]”. It is an HSK 5 Chinese word in the HSK 3.0 vocabulary.
今天跟朋友聊得很痛快。
Jīntiān gēn péngyou liáode hěn tòngkuài.
Today I had a very satisfying chat with friends.
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