174. The final syllable of the first member of compounds (181) sometimes
undergoes certain changes by analogy to other compounds:
(1.) The final #-ā# of #ā-#stems, by analogy to the more frequent
#-o-#stems, usually changed to #-o#, which in atonic syllables became
#-i# (105): as, #āli-ger#, _winged_, for #*ālo-ger# from #ālā-#.
(2.) Stems in #-on-# substitute #-o-# for #-on-# by analogy to the
#-o-#stems: as, #homi-cída#, _murderer_, for #*homo-cīda# (105) from
#homon-# (Nom. #homō#).
(3.) Some stems in #-s# substitute #-o-# by analogy to the #-o-#stems:
as, #foedi-fragus#, _treaty-breaking_, for #*foedo-fragus# from the stem
#foedos-# (Nom. #foedus#, Gen. #foederis#; 154).
[In section 174, anomalous forms such as #-o-#stems (without space)
are in the original.]