§262. Denominative Verbs

Many ī-verbs or verbs of the Fourth Conjugation are formed from i-stems:—

• mōlior, -īrī, to toil, from mōlēs (-is), mass.
• fīniō, -īre, to bound, from fīnis, end.
• sitiō, -īre, to thirst, from sitis, thirst.
• stabiliō, -īre, to establish, from stabilis, stable.

a. Some arise by confusion from other stems treated as i-stems:—

• bulliō, -īre, to boil, from bulla (stem bullā-), bubble.
• condiō, -īre, to preserve, from condus (stem condo-), storekeeper.
• īnsāniō, -īre, to rave, from īnsānus (stem īnsāno-), mad.
• gestiō, -īre, to show wild longing, from gestus (stem gestu-), gesture.

b. Some are formed with -iō from consonant stems:—

• cūstōdiō, -īre, to guard, from cūstōs (stem cūstōd-), guardian.
• fulguriō, -īre, to lighten, from fulgur, lightning.