unhelpful

adjective

1. giving or rendering aid or assistance; of service: Your comments were very helpful.

adjective

1. not serving a useful function

adjective

1. serving a useful function; giving help

adj.1590s, from un- (1) “not” + helpful. Related: Unhelpfully; unhelpfulness. adj.late 14c., from help (n.) + -ful. Related: Helpfully; helpfulness.