B2 not able to be trusted or believed不可靠的;不能信赖的
More examples
Several unreliable dealers have been struck off our list of authorized suppliers.
"He's so unreliable!" she said crossly.
Managers had complained that the workers were lazy and unreliable.
I wouldn't ask Angie to do it, she's completely unreliable.
Don't be influenced by the figures, they're a bit unreliable.
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