The word "grimily" is spelled with the letter combination "-ily," which represents the adverbial suffix that forms adverbs from adjectives. In IPA phonetic transcription, it is pronounced as /ˈɡrɪmɪli/, with the stress on the first syllable "grim" and the secondary stress on the third syllable "li." The "i" sound in the second syllable is pronounced as a short "i" sound, while the "y" in the fourth syllable represents a vowel sound that is similar to the "ee" sound in "me."