sufficiency /sə-fishˈəns-i/ noun

1. The state of being sufficient
2. A sufficient quantity or supply
3. Means enough for a comfortable living
4. Adequate ability, competence, capacity (obsolete or archaic)

sufficˈient adjective

1. Adequate for the purpose
2. Sufficing
3. Effective
4. Being a sufficient condition (logic)
5. Competent (archaic)

A sufficient quantity, enough

sufficˈiently adverb

suffīcˈing adjective

sufficˈingness noun

suffisance /sufˈi-zəns/ noun (obsolete)

1. Sufficiency
2. Satisfaction
3. Enjoyment

sufficient condition noun (logic)

A condition or proposition whose existence assures the truth of, or leads to the occurrence of, a further condition

suffice it to say

Let it be enough to say