English word tighten comes from English -en, English tight

Detailed word origin of tighten

Dictionary entry	Language	Definition
-en	English (eng)	(dialectal, or, non-standard, rare) Used to form the plural of nouns. Can be used to denote the plural form of a small number of English words, the majority of whose etymology goes back to the n-stem (i.e. weak noun) declension of Germanic languages. Used to form the diminutives of certain nouns. When attached to certain adjectives, it forms a transitive verb whose meaning is, to make [...]
tight	English (eng)	(obsolete) To tighten. (colloquial) Scarce, hard to come by.. (colloquial, figurative) Intimately friendly.. (obsolete) Handy; adroit; brisk.. (obsolete) Not ragged; whole; neat; tidy.. (of a space, design or arrangement) Narrow, such that it is difficult for something or someone to pass through it.. (poker) Of a player, who plays very few hands. (Can we add an example for this sense?). [...]
tighten	English (eng)	(economics) To make money harder to borrow or obtain.. (economics) To raise short-term interest rates.. (intransitive) To become tighter.. (transitive) To make tighter.

Words with the same origin as tighten