show one's cards

Verb

idiomatic

(idiomatic) To reveal something known to oneself but previously concealed from others.

Japanese Meaning

隠していた意図や計略、秘密などを明かす / 以前は他人に隠されていた自分にしかわからない情報を露呈する

In negotiation advice, you're often told not to show one's cards too early.

交渉のアドバイスでは、早い段階で手の内を明かさないようによく言われる。

Sense（1）

(idiomatic) To reveal something known to oneself but previously concealed from others.

shows one's cards

（ present singular third-person ）

showing one's cards

（ participle present ）

showed one's cards

（ past ）

shown one's cards

（ participle past ）

showed one's cards

（ US also participle past ）