From Latin mōmentum.

• (British) IPA: /ˌmə(ʊ)ˈmɛntəm/
• (America) IPA: /ˌmoʊˈmɛntəm/

momentum

1. (physics) Of a body in motion: the tendency of a body to maintain its inertial motion; the product of its mass and velocity, or the vector sum of the products of its masses and velocities.
2. (physics) Strength or force gained by motion or movement.
3. The impetus, either of a body in motion, or of an idea or course of events; a moment.
   • 1882, Thomas Hardy, chapter II, in Two on a Tower. A Romance. [...] In Three Volumes, volume II, London: Sampson Low, Marston, Searle, & Rivington, […], →OCLC ↗, page 31 ↗:

     Their intention to become husband and wife, at first halting and timorous, had accumulated momentum with the lapse of hours, till it now bore down every obstacle in its course.

• French: quantité de mouvement
• German: Impuls
• Italian: spinta, impulso, momento
• Portuguese: momento
• Russian: и́мпульс
• Spanish: cantidad de movimiento, ímpetu

• French: élan
• German: Schwung, Wucht, Schwungkraft, Moment
• Italian: slancio, momento, impulso, impeto
• Portuguese: ímpeto, impulso
• Russian: и́мпульс
• Spanish: ímpetu, impulso