re·tard 1 
(rĭ-tärd)
(rĭ-tärd)v. re·tard·ed, re·tard·ing, re·tards
v.tr.
To cause to move or proceed slowly; delay or impede.
v.intr.
To be delayed.
n.
1. A slowing down or hindering of progress; a delay.
2. Music A slackening of tempo.
[Middle English retarden, from Old French retarder, from Latin retardāre : re-, re- + tardāre, to delay (from tardus, slow).]
re·tarder n.
- monopoly
- monopropellant
- monoprotic
- monopsonist
- monopsonistic
- monopsony
- monopteros
- monorail
- monosaccharide
- monosodium glutamate
- monosome
- monosomic
- monosomy
- monospermous
- monostand
- monostich
- monostome
- monosulfide
- monosyllabic
- monosyllabically
- monosyllable
- monosynaptic
- monosynaptically
- monotheism
- monotheist