Where does “źradło” come from?

źradło (Polish) comes from Polish -dło, from Old Polish -dło, from Proto-Slavic -dlo, from Proto-Indo-European -dʰlom — Alternative form of *-trom; instrumental suffix;...

Ancestry of “źradło”, step by step

StepLanguageWordMeaning
1Polish-dłoAppended to verbs to form nouns meaning: an...
2Old Polish-dłoforms neuter nouns, usually [[nomen instrumenti
3Proto-Slavic-dloForms nouns denoting a tool or instrument
4Proto-Indo-European-dʰlomAlternative form of *-trom; instrumental suffix;...
Every word from Proto-Indo-European -dʰlom →Every word from Proto-Slavic -dlo →Every word from Polish -dło →