Declinatio II. Declinatio secunda The second declension

Declinatio secunda
The second declension
Masculine
Neuter
Nom. sg. – us (m),
-er (m), -um (n)
Gen sg. -i
populus, i m people, nation
servus, i m slave
dominus, i m master
arbiter, i m arbiter
magister, i m teacher
puer, i m boy
pactum, i n pact
bellum, i n war
officium, i n duty

Nota bene!
They are feminine:
humus, i f ground
pinus, i f pine tree
malus, i f apple tree
They are neuter:
pelagus, i n sea
virus, i n venom
vulgus, i n crowd

Masculine nouns -us

Masculine nouns -er

Neuter nouns

Ad Ciceronem
Disertissime Romuli nepotum,
Quot sunt quotque fuere, Marce Tulli...
(Catullus)

Ab ovo usque ad mala
ovum, i n egg malum, i n apple

Deus ex machĭna
deus, i m бог machina, ae f машина

Per aspera ad astra

Aut cum scuto aut in scuto