Where does “ușurel” come from?

ușurel (Romanian) comes from Romanian ușor, from Latin ostiolum, from Latin -olus, from Latin -lus, from Proto-Italic -elos, from Proto-Indo-European -e-lós, from Proto-Indo-European -lós — Forms agent nouns from verbal roots.

Ancestry of “ușurel”, step by step

StepLanguageWordMeaning
1Romanianușorlight; easy; easily
2Latinostiolumsmall door
3Latin-olusAlternative form of -ulus; "forming diminutives";...
4Latin-lusAlternative form of -ulus; diminutive suffix
5Proto-Italic-elosForms desubstantival and deadjectival diminutive nouns
6Proto-Indo-European-e-lós
7Proto-Indo-European-lósForms agent nouns from verbal roots
Every word from Proto-Indo-European -lósEvery word from Latin -lusEvery word from Latin -olus