- active
- diligent
- indefatigable
Similar to impiger
- impigre – actively, diligently
- impirius – fiery
- impius – irreverent, ungodly, unpatriotic, wicked, without respect
- piger – dull, lazy, slow
- imminuare – abbreviate
- immerito – undeservingly, unjustifiably, without merit
- impetus – assault, attack, force, impulse, onset, passion, rapid motion, rush, sudden passion, vehemence