includeinclude

Include comes from Middle English includen, from Latin inclūdō ‘to shut in, enclose’ (in- + claudō ‘to shut’), ultimately from PIE *kleh₂w- ‘key’.

1. Proto-Indo-Europeanc. 4500–2500 BCE*kleh₂w-¹‘key, hook, nail’reconstructed
2. Latinc. 75 BCE–200 CEclaudō¹‘to shut’
3. Latinc. 75 BCE–200 CEinclūdō¹‘to shut in, enclose’
4. Middle Englishc. 1150–1500includen¹
5. Englishearliest quotation c. 1590–1591include¹

1. ¹ Wiktionary, English include
2. Earliest quotation in Wiktionary’s entry: c. 1590–1591, William Shakespeare, The Two Gentlemen of Verona: “Come, let us go; we will include all jars…”.