1. By bad luck
   - unfortunately, unluckily, alas

See also: regrettable

• unwieldiness
• unwieldy
• unwilled
• unwilling
• unwillingly
• unwillingness
• unwind
• unwire
• unwise
• unwisely
• unwiseness
• unwished
• unwished-for
• unwitting
• unwittingly
• unwomanly
• unwonted
• unwontedly
• unwooded
• unworkable
• unworkmanlike
• unworldly
• unworn
• unworried
• unworthily