hé​lì

join forces

合力 hé​lì
join forces adverb
to work together or combine efforts to achieve a common goal

Everyone worked together to move the heavy machine into the workshop.

resultant force noun
the single vector force that is the sum of two or more forces acting on an object

If the resultant force on an object is zero, it will remain at rest.

Frequency

Movie subtitles
0.570 per million appears in 0% of films
Written text
8.09 per million

Sources

Definitions
CC-CEDICT