Similar to infissum
- incassum – in vain, to no purpose
- infossum – bury, to dig in
- infusum – administer, to pour in or over
- intervigilium – a doze, a nap, forty winks
- ingeniosus – able, adapted, neturally fit, talented
- insuadibilis – adamant, immovable, not to be persuaded
- infestus – aggressive, dangerous, hostile