implacable
/ɪmˈplækəb(ə)l/adj
High School
1
Not able to be placated or appeased.
2
Impossible to prevent or stop; inexorable, unrelenting, unstoppable.
3
Adamant; immovable.
Thesaurus
Sound Patterns & Rhymes
Alliteration
Words starting with the same consonant sound — used in poetry and prose to create rhythm, emphasis, and memorable phrasing (e.g. “Peter Piper picked”)
Assonance
Words sharing similar vowel sounds regardless of starting letter — creates internal melody in writing