Where does “lamentable” come from?

lamentable (Middle French) comes from Latin lāmentābilis, from Latin -bilis, from Proto-Italic -ðlis, from Proto-Indo-European -dʰlis, from Proto-Indo-European -dʰlom — Alternative form of *-trom; instrumental suffix;...

Ancestry of “lamentable”, step by step

StepLanguageWordMeaning
1Latinlāmentābilismournful, full of sorrow
2Latin-bilis-ble
3Proto-Italic-ðlisForms adjectives from verb stems indicating capacity or worth of being acted on
4Proto-Indo-European-dʰlis
5Proto-Indo-European-dʰlomAlternative form of *-trom; instrumental suffix;...

Words derived from “lamentable

Every word from Proto-Indo-European -dʰlomEvery word from Latin -bilisEvery word from Latin lāmentābilis