ひとしお Also written 一入 Meanings Adverb still more; especially Example sentences 火星は地球とよく似ているだけにひとしお興味をひく。Mars is all the more interesting for its close resemblance to our Earth. その知らせで私達の喜びもひとしおでした。The news added to our happiness. Jinuma: Japanese Dictionary · Word lists