Harsh
Harsh (adj) /hɑːʃ/ US /hɑːrʃ/
difficult to tolerate or endure, severe, intense, austere, unpleasant and unkind, unsympathetic and critical, inhospitable
She’s so squeamish. So, she cannot stand any harsh criticism.
harsh voice / chemicals / punishment
Antonyms: mild, gentle, kind, pleasant
Noun: harshness
Adverb: harshly