Noisy
Loud, Annoying
い adjective
This is a single kanji with an い on the end, meaning you know it's probably an adjective. What's the adjective form of annoy? It's annoying!
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you:
What's noisy? That uni's rude sighing (うるさい). It just keeps sighing loudly over and over. It's sooo annoying!
彼がポテトチップスを食べる音が煩くて苛々します。
The sound of him eating potato chips is loud and annoying.
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