167. Pronunciation of two successive consonants is sometimes facilitated
by the insertion of a consonant which serves as a glide. Such insertion
is not frequent.
In inflection a #p# was thus developed between #m# and #s#, between #m#
and #l#, and between #m# and #t# (elsewhere #mt# changed to #nt#, see
164, 3): as, #sūmpsī#, _I took_, #sūmptus#, _taken_, from #sūmere# for
#*sūmsī#, #*sūmtus#; and in the corresponding forms of #cōmō#, #dēmō#,
#prōmō# (953); #exemplum#, _pattern_, for #*exemlum# from the stem
#em-#, _take_ (cf. #eximere#, 103, #a#).