暧昧

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Wiktionary

1. 1.vague; obscure; ambiguous
2. 2.dubious; shady; (sometimes, of relationship) adulterous; illicit
3. 3.intimate but not explicit; showing fondness and interest in a romantic relationship, but not making the romantic intentions clear; amorous; flirty; flirtatious
4. 4.to maintain an ambiguous and flirtatious relationship (with someone)

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