Adjectives

(s)loath, loth, reluctantunwillingness to do something contrary to your custom“a reluctant smile”, “loath to admit a mistake”
(s)antipathetic, antipathetical, averse, indisposed, loath, loth(usually followed by ‘to’) strongly opposed“antipathetic to new ideas”, “averse to taking risks”, “loath to go on such short notice”, “clearly indisposed to grant their request”