In-vet-er-ate, hen, sefydlog
In-vid-i-ous, cenfigenus; atgas
In-vig-or-ate, cryfhau, bywioli
In-vin-ci-ble, anorchfygol, anorfod
In-vis-i-ble, anweledig, anhywel
In-vi-ta-tion, gwahoddiad; deniad
In-un-da-tion, llifddwfr, llifeiriant
I-ron-i-cal, gwawdieithiol, gwatwarus
I-ron-mon-ger, haiarn werthwr
Ir-ra-di-ate, pelydru; goleuo