Where does “jirișor” come from?

jirișor (Romanian) comes from Romanian jir, from Serbo-Croatian žir, from Proto-Slavic žirъ — feed?, fodder?, grease?.

Ancestry of “jirișor”, step by step

StepLanguageWordMeaning
1Romanianjirbeech nut
2Serbo-Croatianžiracorn; acorns
3Proto-Slavicžirъfeed?, fodder?, grease?
Every word from Proto-Slavic žirъ →Every word from Serbo-Croatian žir →Every word from Romanian jir →