bonus (m) or bona (f):
good
benignus (m) or benigna (f):
kind
malus (m) or mala (f):
bad
improbus (m) or improba (f):
wicked, naughty
rapidus (m) or rapida (f):
smart, fast
stultus (m) or stulta (f):
not-so-smart
celer (m) or celeris (f):
fast
lentus (m) or lenta (f):
slow
magnus (m) or magna (f):
big
parvus (m) or parva (f):
small, short
iucundus (m) or iucunda (f):
pleasant
ridiculus (m) or ridicula (f):
ridiculous, funny
gravis (m or f):
serious, heavy
altus (m) or alta (f):
tall
irritabilis (m or f):
irritable