糸がほつれる。の英語

Thread ravels

to spin thread or yarn

to cause a thread to become twisted

A string snaps―parts with a snap.

the manufacturing of thread

spin yarn

The string becomes frayed.

a thread called 'chuboshi'

a kind of yarn called spun silk yarn

thread prepared and used for weaving, knitting and rope-making, called yarn

the weight of thread

a thread of fine quality

to quill

A string snaps.

a thread called raw silk

The threads are hard as nails.

to be stringy

pack-thread―pack-twine

to spin （cotton into thread―thread out of cotton）

to tie strings together

to twist a thread

creating thread

to pay out the string of a kite

to weight a line

to make someone twist thread

The threads are hard as nails.

snarled thread

to reel silk off cocoons

a twisted thread

to reel thread