insecure

Etymology

in- + secure, or from Medieval Latin insēcūrus, itself from in- (“in-, un-, non-”) + sēcūrus (“safe, certain”)

adj

1. Not secure.
2. Not comfortable or confident in oneself or in certain situations.
   He's a nice guy and all, but seems to be rather insecure around other people.
   Imagine being so insecure that you make it against the law for folks to dislike you.
   The half-dozen pieces […] were painted white and carved with festoons of flowers, birds and cupids. […] The bed was the most extravagant piece. Its graceful cane halftester rose high towards the cornice and was so festooned in carved white wood that the effect was positively insecure, as if the great couch were trimmed with icing sugar. 1963, Margery Allingham, chapter 1, in The China Governess