revealing
US /rɪˈviː.lɪŋ/
UK /rɪˈviː.lɪŋ/

1.
making interesting or significant information known, especially information previously kept secret
:
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The documentary offered a revealing look into the artist's private life.
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His latest book contains some very revealing insights into his political views.
2.
(of clothing) allowing a lot of the wearer's body to be seen
:
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She wore a very revealing dress to the party.
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His shirt was so thin it was almost revealing.