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"pester" is also used as a crossword clue. If that's what you saw, the answer is often harry (5 letters).
Definitions
To annoy, bother, or trouble someone repeatedly.
Word origin
In the senses of “overcrowd (a place)” and “impede (a person)”: from Middle French and Old French empestrer (“encumber”), influenced by English pest. The modern sense is an extension of the sense “infest”. Comparable to English construction pest + -er (used to form frequentative verbs).
Used in a sentence
“He pestered me with questions.”
“She pestered him to help her.”
“By now I presumed I had become a real pester.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Keep annoying”6 letters
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