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相等しい (あいひとしい) Japanese meaning | Kotomora

相あい等ひとしい

あ

い

ひ

と

し

い

Meanings

1

i-adjective

equal to each other; mutually equal

Used when two or more things are equal in value, degree, or status. Often appears in formal or mathematical contexts. The kanji spelling is rare.

この二ふたつの三さん角かく形けいの面めん積せきはあいひとしい。
The areas of these two triangles are equal to each other.
両りょう者しゃの権けん利りはあいひとしいと認みとめられる

。

The rights of both parties are recognized as mutually equal.

Kanji

相inter-, mutual, together
等etc., and so forth, class (first)

Similar words

等ひとしい
等しい is the standard word for 'equal' and is much more common. 相等しい adds the prefix 相 (あい) to emphasize mutuality, but it is rare and formal.

Etymology

Compound of prefix 相 (あい, 'mutual') and adjective 等しい (ひとしい, 'equal'). The exact historical derivation is uncertain, but it follows a common pattern of forming reciprocal adjectives.