出典:Wiktionary
出典:『Wiktionary』 (2026/04/17 23:41 UTC 版)
From day + book. First attested in 1571. Cognate with Dutch dagboek (“diary, journal, logbook”), German Tagebuch (“diary, journal, daybook”), Danish dagbog (“diary”), Swedish dagbok (“diary, logbook, journal, daybook”).
daybook (plural daybooks)