173. (1.) To avoid the repetition of the same liquid in successive
syllables #l# is sometimes changed to #r#: as, #caeruleus#, _sky-blue_,
for #*caeluleus#, from #caelum#; #Parīlia#, by the side of #Palīlia#,
from #Palēs#; the suffix #-clo-# appears as #-cro-# after an #l#: as,
#lavācrum#, _bath_, #simulācrum#, _image_ (241); the suffix #-āli-#
under like conditions changes to #-āri-#; as, #molāre#, _of a mill_
(313), but #augurāle#, _of an augur_.
(2.) In a few cases repetition is avoided by dropping the sound once:
as, #praestīgiae#, _jugglery_, for #praestrīgiae#. This also applies to
the spirant #s# followed by a consonant, a combination which is not
tolerated in successive syllables: as in the reduplicated perfects
#stetī#, for #*stestī#; #spopondī#, for #*spospondī# (859), where the
second syllable, and in #quisquiliae#, _sweepings_, for #*squisquiliae#,
where the first syllable was lightened.