1. Not returned in kind
   "unrequited (unanswered) love"
   - unreciprocated, unrequited

See also: nonreciprocal

• quadrilateral
• quadrille
• quadrillion
• quadrillionth
• quadripara
• quadripartite
• quadriphonic
• quadriphonic system
• quadriplegia
• quadriplegic
• quadrisonic
• quadrivalent
• quadrivial
• quadrivium
• quadroon
• quadrumanous
• quadrumvirate
• quadruped
• quadrupedal
• quadruple
• quadruple time
• quadruplet
• quadruplex
• quadruplicate
• quadruplication