fin

end; boundary or limit

Spelled fin · finis 'end, boundary, limit'; finire 'bound, limit, finish'

Latin finis marks an end or boundary: finish reaches it, finite stays within it, and infinite has none.

Words built from it

final — coming last; allowing no further change
fin (end) + -al (relating to)
finish — bring something to an end or complete it
fin (end) + -ish (verb ending)
finite — having limits or a definite amount
fin (limit) + -ite (past participle ending)
confine — keep within limits or an enclosed place
con- (together) + fin (boundary)
define — state the exact meaning or limits of something
de- (thoroughly) + fin (limit)
infinite — without limit or end
in- (not) + fin (limit) + -ite (past participle ending)
finance — the management or provision of money
fin (end) + -ance (action or result)

finger — From Old English finger, a Germanic word for the body part. Its fin letters do not come from Latin finis.