fret
verb [ I ] uk/fret/ us/fret/ -tt-
烦躁不安;苦恼，发愁
to be nervous or worried
Don't fret - I'm sure he's OK. 别发愁——他肯定没事。
She spent the day fretting about/over what she'd said to Nicky. 她为对尼基说的话而担心了一整天。
fret
noun [ C ] uk/fret/ us/fret/
（吉他等弦乐器指板上定音的）品
any of the small raised metal bars across the long, thin part of a stringed musical instrument such as a guitar, that show you where to put your fingers on the strings in order to produce different notes