1. Exerting force or influence
   "the law is already in effect (or in force)"
   - effective, good, in effect

See also: operative

• ecosystem
• ecoterrorism
• ecotourism
• ecotown
• ecotoxicology
• ecotype
• ecovillage
• ecphonesis
• ecrevisse
• ecru
• ecstasy
• ecstatic
• ecstatic state
• ecstatically
• ECT
• ectasia
• ectasis
• ecto-
• ectoblast
• ectoderm
• ectodermal
• ectodermic
• ectomorph
• ectomorphic
• ectomorphy