suf·fice 
(sə-fīs)
(sə-fīs)v. suf·ficed, suf·fic·ing, suf·fic·es
v.intr.
1. To meet present needs or requirements; be sufficient: These rations will suffice until next week.
2. To be equal to a specified task; be capable: No words will suffice to convey my grief.
v.tr.
To satisfy the needs or requirements of; be enough for.
[Middle English suffisen, from Old French suffire, suffis-, from Latin sufficere : sub-, sub- + facere, to make; see dhē- in the Appendix of Indo-European roots.]
suf·ficer n.