1
general::
unwilling/not willing
not wanting to do something and refusing to do it:
• She's unwilling to admit that she was wrong. • Stuart was an unwilling participant in the shooting. • Put away any toys the child is not willing to share, to avoid any problems.
reluctant
not willing to do something, although you may be persuaded after a while. Also used when someone does something after at first being unwilling to do it:
• He was reluctant to talk about his childhood. • She gave a reluctant smile. • the government's reluctant agreement to hold talks • a reluctant hero
grudging
given unwillingly – used about admiration, respect, support, or an apology:
• He gave her a grudging apology. • He could not help feeling a grudging admiration for the old lady.
be loath to do something
to not want to do something, especially something that you might have to do – a rather formal use:
• He has more staff than he needs, but he is loath to get rid of good people.
Longman-Thesaurus