Does the word "untrustworthy" an abbreviation of "not worthy of trust?"

Native speaker’s answer
Rebecca
Yes! As shown in this video, the adjective form is "untrustworthy," which means to not be worthy of trust. The speaker uses it here to share that certain gestures made by Bill Clinton during his early political years made him seem untrustworthy to the public. Ex: She likes to lie, so many people consider her to be untrustworthy. Ex: Be careful buying those products. Some people say that company is untrustworthy.