346. The comparative suffix is #-iōs-#, which becomes in the singular,
nominative masculine and feminine, #-ior# (154; 132), neuter nominative
and accusative, #-ius# (107, _c_); in all other cases #-iōr-# (154).
347. Other comparative suffixes are #-ro-# or #-ero-#, and #-tro-# or
#-tero-#, used in a few words, principally designating place: as,
#sup-erī#, _the upper ones_, #īnferī#, _the nether ones_; #ex-terī#,
_outsiders_, #posterī#, _after-generations_; #alter#, _the other_;
#uter#, _whether?_ _which of the two?_ (for #*quo-ter#, 146); #dexter#,
_right_.
348. Some words designating place have a doubled comparative suffix,
#-er-iōr-#, or #-ter-iōr-#: as, #sup-er-ior#, _upper_, #īnferior#,
_lower_. #ci-ter-ior#, _hither_, #dēterior# (_lower_), _worse_,
#exterior#, _outer_, #interior#, _inner_, #posterior#, _hinder_,
_after_, #ulterior#, _further_, #dexterior#, _more to the right_,
#-is-tro-# is used in two words which have become substantives:
#min-is-ter# (_inferior_), _servant_, and #magister# (_superior_),
_master_.