In-ex-cus-a-ble, diesgus
In-ex-pe-di-ence, anaddasrwydd
In-ex-pe-di-ent, anghyfaddas; anaddas; anfuddiol
In-ex-pe-ri-ence, diffyg ymbrawf; anymarferiaeth
In-fi-del-i-ty, anffyddiaeth
In-ge-nu-i-ty, cywreinrwydd
In-hu-man-i-ty, creulondeb, cieidd-dra
In-im-i-ta-ble, anefelychadwy; rhagorol
In-nu-mer-a-ble, aneirif, afrifed
In-oc-u-la-tion, llygadimpiad