Adjectives agree in number, gender, and case with the noun which they modify. (a) Those ending in us (masculine), a (feminine), um (neuter), are of the second declension, and take the same case-endings as nouns with the same terminals, as in Rules 1, 2, and 3. The most employed are: albus (white), amarus (bitter), aromaticus (aromatic), benzoinatus (benzoin-ated), camphoratus (camphorated), catharticus (cathartic), colatus (strained), compositus (compound), corrosivus (corrosive), dilutus (diluted), durus (hard), exsiccatus (dried), flavus (yellow), fluidus (fluid), frigidus (cold), granulatus (granulated), hydratus (hydrated), inspissatus (inspissated), magnus (great), parvus (small), ponderosus (heavy), praecipitatus (precipitated), praeparatus (prepared), purificatus (purified), recti-ficatus (rectified), reductus (reduced), rubrus (red), saturatus (saturated), tepidus (warm), unus (one). Duo (two) has accusative duos.

Examples of agreement with the noun are: syrupus aromati-cus, fluidextractum aromaticum, cochlearia parva, pilulas cathar-ticas, tinctura lavandulae composita, pulveris glycyrrhizae com-positi.

(b) Those ending in is (masculine and feminine), e (neuter), take endings as follows: is takes gen. is, ace. em, ace. plural es.

e takes gen. is, ace. e, ace. plural ia.

Examples are: aequalis (equal), animalis (animal), dulcis (sweet), fortis (strong), glacialis (glacial), levis (light), mitis (mild), mollis (soft), omnis (every), simplex, icis (simple), solubilis (soluble), talis (such), tres (three), vegetabilis (vegetable), viridis (green). Some ending in ens have genitive entis, and ace. entem or ente, as adstringens (astringent), bulliens (boiling), effervescens (effervescing), fervens (hot), recens (fresh).

Examples of agreement with the noun are: succi limonis recentis, partes aequales, amygdalae dulcis, hydrargyri chloridum mite, doses tales.

Adjectives of one declension may modify nouns of another declension, but each takes the ending of its own declension.