enter

The story

1. Latin · derived fromintrō“enter”
2. Old French · derived fromentrer
3. Middle English · inherited fromentren
4. English todayenter

From Middle English entren, from Old French entrer, from Latin intrō (“enter”, verb), from intrā (“inside”). Has been spelled as "enter" for several centuries even in the United Kingdom, although British English and the English of many Commonwealth Countries (e.g. Australia, Canada) retain the "re" ending for many words such as centre, fibre, spectre, theatre, calibre, sombre, lustre, and litre.

Words from the same roots