untrustworthy
/ˌʌnˈtɹʌstˌwɜɹ.ði/ adjective C2- Not deserving of trust; unreliable.
Comparative untrustworthier · Superlative untrustworthiest
From the library
I must say, with all her faults, I never found her disobedient or untrustworthy before and I’m real sorry to find her so now.”
Don’t call her untrustworthy until you’re sure she has disobeyed you.
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