adjective

influential

influential, powerful, important

She is an influential figure in politics.

She is an influential figure in politics.

His book was highly influential.

His book was highly influential.

((influential)) ((in sth./-ing)) having a lot of influence in a particular area She was influential in shaping the policy.

((an influential)) person/figure/book a person or thing with a lot of influence He is an influential writer.

Synonyms: powerful, important, significant; Antonyms: insignificant, unimportant.

From the noun 'influence' plus the adjective-forming suffix '-ial'. It means 'having influence'.

Think of someone or something that is 'full of influence'. The '-ial' suffix often turns a noun into an adjective.

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