adj. 25B6; adjective
trivial problems : UNIMPORTANT, insignificant, inconsequential, minor, of no account, of no consequence, of no importance; incidental, inessential, non-essential, petty, trifling, pettifogging, footling, small, slight, little, inconsiderable, negligible, paltry, nugatory; informal piddling, piffling, fiddling, penny-ante.
I used to be quite a trivial person : FRIVOLOUS, superficial, shallow, unthinking, empty-headed, feather-brained, lightweight, foolish, silly.
important, significant, serious.