keep
To continue in (a course or mode of action); to not intermit or fall from; to uphold or maintain.
Example
“to keep silence;  to keep possession”
Other meanings
To remain faithful to a given promise or word.
“  to keep one's word;  to keep one's promise”
To hold the status of something.
Example sentences
Word history
From Old English "cēpan" (to seize, hold, observe).
Where this comes from
This definition is adapted from “keep” on Wiktionary, by its contributors; example sentences are from Tatoeba, credited to their authors above, published under CC BY-SA 4.0. This page is published under the same licence.