1. Not returned in kind
   - unanswered, unrequited

See also: nonreciprocal

• locomotive
• locomotive engine
• locomotive engineer
• locomotor
• locomotor ataxia
• locoweed
• locular
• locule
• loculus
• locum
• locum tenens
• locus
• locus classicus
• locus niger
• locus of infection
• locus standi
• locust
• locust bean
• locust pod
• locust tree
• Locusta
• Locusta migratoria
• Locustidae
• locution
• loddon pondweed