1. Not easy to combine harmoniously
   - ill-sorted, incompatible, mismated, unsuited

See also: mismatched

• single dwelling
• single entry
• single file
• single nucleotide polymorphism
• single out
• single prop
• single quote
• single shell
• single stitch
• single supplement
• single tax
• single-barreled
• single-barrelled
• single-bedded
• single-breasted
• single-breasted jacket
• single-breasted suit
• single-celled
• single-channel
• single-entry bookkeeping
• single-foot
• single-handed
• single-handedly
• single-humped
• single-lane