luó​xuán

screw

螺旋 luó​xuán
screw noun
a mechanical fastener or component with a helical thread, such as a bolt or a propeller

The threads of this bolt are very deep.

spiral noun
a curve that emanates from a central point or axis, moving progressively farther away; a helix

The structure of DNA is a double helix.

Frequency

Movie subtitles
2.77 per million appears in 1% of films
Written text
4.42 per million

Sources

Definitions
CC-CEDICT