-volus

From volō (“I fly”) +‎ -us (adjective-forming suffix).

-volus (feminine -vola, neuter -volum); first/second-declension suffix

2. Forms adjectives denoting the manner of flying

   vēlum (“sail”) > vēlivolus (“flying by sail, quick-sailing”)

   altus (“high”) > altivolus (“flying high, soaring”)

First/second-declension adjective.

From volō (“I want, will”) +‎ -us (adjective-forming suffix).

-volus (feminine -vola, neuter -volum); first/second-declension suffix

2. Forms adjectives referring to one's will

   bene (“well”) > benevolus (“benevolent, kind, friendly, favorable”)

   male (“badly”) > malevolus (“malevolent, spiteful”)

First/second-declension adjective.