a.
1.
Uneven, not divisible by 2.
2.
Unmatched, single ( of a pair or set ).
3.
Supernumerary, redundant, left over ( from a specified number ), additional, remaining.
4.
Unheeded.
5.
Retired, secluded.
6.
Incidental, casual, fragmentary.
7.
Unsuitable, inappropriate, queer.
8.
Singular, unusual, extraordinary, queer, quaint, strange, uncommon, eccentric, fantastic, whimsical, peculiar, unique, comical, droll, grotesque, extravagant, out of the way, bizarre .