1. Lasting through a week
   - weeklong

See also: long

• efficiency apartment
• efficiency engineer
• efficiency expert
• efficient
• efficiently
• effigy
• effing
• effleurage
• effloresce
• efflorescence
• efflorescent
• effluence
• effluent
• effluvial
• effluvium
• efflux
• effluxion
• effort
• effortful
• effortfulness
• effortless
• effortlessly
• effortlessness
• effrontery
• effulgence