比喩 (ひゆ) combines the on'yomi 比 (ヒ), meaning to compare, and 喩 (ユ), meaning to illustrate or liken. Incorrect readings like ひし misread 喩. くらべ and たとえ are the kun'yomi for 比 and 喩 respectively, which are not used in this on'yomi compound. It refers to the use of comparisons like metaphors, similes, or other figures of speech to explain or describe something.

比喩（ひゆ）は両漢字とも音読み。比（ヒ）は「くらべる」、喩（ユ）は「たとえる」の意味。ひしは喩の誤読、くらべ・たとえはそれぞれ比・喩の訓読みです。物事を説明するために、他と比較してたとえる表現技法を指します。