rĕtardātĭo, ōnis, f. [retardo],
a hindering , delaying , retarding , Cic. Phil. 5, 11, 30 (with mora).— In plur., Vitr. 9, 1, 6.
retardātiō ōnis, f retardo, a delaying, retarding : bellum tractum ex retardatione. ...
An Elementary Latin Dictionary