WordNet sense 1 (of textures that are rough to the touch or substances consisting of relatively large particles):

coarse

WordNet sense 2 (unpleasantly stern):

rough

WordNet sense 3 (disagreeable to the senses, to the mind, or feelings ):

unpleasant

WordNet sense 4 (lacking kindness):

unkind

WordNet sense 5 (sharply disagreeable; rigorous):

abrasive

WordNet sense 6 (not to your liking):

disagreeable