IPA: /ˌʌnəˈsweɪdʒəbl/
KK: /ʌnəˈswɛdʒəbl/
Something that cannot be made less severe or intense; it remains strong and unyielding.
Her grief was unassuageable, no matter how much comfort her friends tried to offer.
Unassuageable → It is formed from "un-" (meaning not), "assuage" (from Latin "assuaviare", meaning to soften or calm), and "-able" (meaning capable of). The word describes something that cannot be calmed or softened, indicating an unrelenting state of distress or desire.
Think of something that is 'not' ('un-') able to be 'softened' or 'calmed' ('assuage') — that's why unassuageable means it cannot be soothed.