A nailbrush is a small brush with short, stiff bristles, made for scrubbing under and around your fingernails. It usually has no handle, or only a small one — you hold the whole thing in your palm and scrub.

A nailbrush is a small brush with short, stiff bristlesNailbrush是一種有短而硬的刷毛的小刷子 made for scrubbing under and around your fingernails是用來刷指甲下面和周圍的 It usually has no handle, or only a small one它通常沒有握把，或只有一個小小的握把 you hold the whole thing in your palm and scrub你把整支刷子握在手掌裡刷洗

You find one by the sink in a kitchen or workshop, and hospitals and clinics keep them for scrubbing hands before treating patients. People who work with their hands — mechanics, gardeners, painters, cooks, builders — need one, because ordinary soap and water will not lift dirt out of the small gap under the nail.

You find one by the sink in a kitchen or workshop你會在廚房或工作間的水槽旁邊找到一支 and hospitals and clinics keep them for scrubbing hands before treating patients醫院和診所也會備著，在治療病人之前用來刷手 People who work with their hands用手工作的人 mechanics, gardeners, painters, cooks, builders修車工、園丁、油漆工、廚師、建築工 need one都需要一支 because ordinary soap and water will not lift dirt out of the small gap under the nail因為普通的肥皂和水沒辦法把指甲縫裡的髒污弄出來

The word is written as one word (nailbrush) or as two (nail brush); both are fine and you will see both. It is an ordinary household word, not formal, but it is not a word that comes up often in conversation, simply because most people rarely talk about the thing. It is a countable noun: one nailbrush, two nailbrushes.

The word is written as one word這個字可以寫成一個字 nailbrushnailbrush or as two或兩個字 nail brushnail brush both are fine and you will see both兩種寫法都可以，你都會看到 It is an ordinary household word, not formal這是個普通的家用字，不正式 but it is not a word that comes up often in conversation但也不是對話裡常出現的字 simply because most people rarely talk about the thing單純因為大多數人很少談到這個東西 It is a countable noun它是可數名詞 one nailbrush, two nailbrushesone nailbrush、two nailbrushes