Phonetic: /tau·​tol·​o·​gy/

Part of Speech: Noun

Definition

needless repetition of an idea, statement, or word

Rhetorical repetition, tautology (‘always and for ever’), banal metaphor, and short paragraphs are part of the jargon.
—Philip Howard

an instance of such repetition

The phrase “a beginner who has just started” is a tautology.