§111. bonus, bona, bonum, good

Stems ending in ro- preceded by e form the Nominative Masculine like puer (§ 47) and are declined as follows:—

miser, misera, miserum, wretched

a. Like miser are declined asper, gibber, lacer, līber, prosper (also pros perus), satur (-ura, -urum), tener, with compounds of -fer and -ger: as, saetiger, -era, -erum, bristle-bearing; also, usually, dexter. In these the e belongs to the stem; but in dextra it is often omitted: as, dextra manus, the right hand.

b. The following lack a nominative singular masculine in classic use: cētera, īnfera, postera, supera. They are rarely found in the singular except in certain phrases: as, posterō diē, the next day.