noun
Refers to physical strength, power, or capability. Often used in compounds or set phrases.
彼は力が強い。
He is physically strong.
この仕事は私の力では無理だ。
This job is beyond my ability.
noun, used as a suffix
strength of (number) people
Suffix attached to a number of people to indicate the combined strength or effort of that many individuals. Used in expressions like 十人力 (the strength of ten people).
三人力でその岩を動かした。
They moved the rock with the strength of three people.
The kanji 力 represents strength or power. The reading りき is the on'yomi (Sino-Japanese reading), commonly used in compounds.