349. The common superlative suffix is #-issimo-#, nominative #-issimus#,
with older #-issumo-#, nominative #-issumus# (28).
350. Stems which end in #-ro-#, #-ri-#, or #-li-# (344, 345) take the
suffix #-issimo-# (cf. #-simo-#, 351) with syncope of its initial #i#
(111) and assimilation of the final #l# or #r# (166, 8).
351. The suffix #-timo-# is further used in a few root superlatives:
#ci-timus#, #dextimus#, #extimus#, #intimus#, #optimus#, #postumus#, and
#ultimus#; and #-simo-# in #maximus#, #pessimus#, and #proximus#.
352. The suffix #-mo-# or #-imo-# is used in #sum-mo-#, N. #summus#,
_highest_ (#sub#); #min-imo-#, N. #minimus#, _least_; #prīmus#, _first_,
#septimus#, _seventh_, #decimus#, _tenth_. #-mo-# or #-imo-# is attached
to #-is-# (135, 2) in #plūrimus# for #*plō-is-imo-s# (_fullest_), _most_
(99); and to #-rē-# or #-trē-#, possibly an adverbial form (705), in
#suprēmus#, #extrēmus#, and #postrēmus#.