1. In an ineffective manner
   "he dealt with the problem rather ineffectively"
   - inefficaciously

See also: ineffective

Antonym: effectively

• imperialistic
• imperially
• imperil
• imperilment
• imperious
• imperiously
• imperiousness
• imperishability
• imperishable
• imperishableness
• imperishingness
• imperium
• impermanence
• impermanency
• impermanent
• impermeability
• impermeable
• impermeableness
• impermissibility
• impermissible
• impermissibly
• impersonal
• impersonality
• impersonally
• impersonate