【Petty】 , 【puny】 , 【trivial】 , 【trifling】 , 【paltry】 , 【measly】 , 【picayunish】 , 【picayune】 mean little and insignificant, often contemptibly so.
Something is 【petty】 which by comparison with other things the same in kind but different in size, importance, gravity, or moment is among the smallest or least important. The word often connotes small-mindedness.
Something is 【puny】 which is so small or slight as to seem impotent, feeble, or completely without vitality.
Something is 【trivial】 which seems 【petty】 and commonplace and scarcely worthy of special consideration or notice. The term is often applied to persons, minds, or activities which reveal engrossment in 【trivial】 affairs or a lack of serious or profound interests.
Something is 【trifling】 which is so small as to have little if any value or significance.
Something is 【paltry】 which is ridiculously or contemptibly small in comparison especially to what it should be.
Something is 【measly】 which is contemptibly small (as in size or quantity) or 【petty】 .
Something is 【picayunish】 or 【picayune】 which is insignificant in its possibilities or accomplishments or hopelessly narrow in outlook or interests.