彼女は口が軽い。

Meaning
she has a light mouth

Vocab used in this sentence

彼女
she, her, girlfriend, sweetheart
a, the, is, am, are, will
mouth, bite, vent, lips, opening, entrance, uttered, orifice
is, there, but, ga, will, however
軽い
light, mild, easy, simple, minor, casual, careless

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