noun
four fundamental forces; fundamental interactions
Physics term referring to the four fundamental forces: gravity, electromagnetism, strong interaction, and weak interaction. Often used in educational or popular science contexts.
See also: 基本相互作用
自然界には四つの力が存在すると考えられている。
It is believed that there are four fundamental forces in nature.
四つの力の統一理論はまだ完成していない。
A unified theory of the four fundamental forces has not yet been completed.
More formal and technical term for fundamental interactions, used in physics literature.
Compound of 四つ (yottsu, 'four') + の (no, possessive particle) + 力 (chikara, 'force'). A straightforward descriptive phrase.