adjective
sufficient
suh-FISH-unt/səˈfɪʃnt/
Enough to meet a need, purpose, or standard.
Four chairs provide sufficient seating for the four guests.

Etymology
The “up to” and “make/do” combination developed the sense “supply as a substitute.” Its participle described something adequate: what supplies enough to meet the need.
In context
the cause then a cause is not a sufficient thing enough to bring about the effect
More examples
- One coat of paint was not sufficient.
- We have sufficient evidence to continue.
- Please allow sufficient time for the transfer.
Forms
sufficient
sufficiency noun — an adequate amount
sufficiently adverb — to an adequate degree