Third-person singular or plural present tense of criticise (British spelling); finds fault with or evaluates judgmentally.
From criticise (British spelling, from critic) plus -es verb ending. This is simply the conjugated form of the verb 'criticise.'
Notice how 'criticises' has a double-s: the base verb 'criticise' already ends in -s, then the third-person ending -es adds another s, creating the satisfying sound of 'criti-sai-zes.'
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