vital

vital:
極めて重要な、欠かせない、

（例） It is vital that the field is entered as a numeric with no other text.

USB thumb drive

USB thumb drive:
USBメモリ

untimely

untimely:
早すぎる、季節外れの、

（例） They called the death "very untimely and accidental".

video-sharing website

video-sharing website:

動画共有サイト

（例）They launched their own channel on the video-sharing website.

流行のYouTubeとかですね。

wisdom tooth

a wisdom tooth:

親知らず

wear off

wear off:

擦り切れる、徐々に減少する

（例） The novelty factor wore off.

unclear

unclear:

明確じゃない

（例） An agenda of a meeting is often unclear.

wholesale

wholesale:

卸売、卸の、

＊ retail sales と対で覚えるべし