Where does “língua materna” come from?

língua materna (Portuguese) comes from Portuguese língua, from Old Portuguese lingua, from Latin lingua, from Latin -ula, from Proto-Indo-European -tlom, from Proto-Indo-European -trom, from Proto-Indo-European -tḗr — Derives agent nouns from verbs, denoting someone...

língua materna (Portuguese): mother tongue

Definitions

  1. mother tongue

Ancestry of “língua materna”, step by step

língua materna traces back through two separate lines of ancestry.

via Portuguese língua

StepLanguageWordMeaning
1Portugueselínguatongue; language
2Old Portugueselingua
3Latinlinguatongue; a speech; an utterance or expression
4Latin-ularegō + API → rēgula; tegō + API → tēgula;...
5Proto-Indo-European-tlomAlternative form of *-trom
6Proto-Indo-European-tromForms nouns denoting a tool or instrument
7Proto-Indo-European-tḗrDerives agent nouns from verbs, denoting someone...

via Portuguese materna

StepLanguageWordMeaning
1Portuguesematernafeminine singular of materno; motherly
Every word from Proto-Indo-European -tḗrEvery word from Latin -ulaEvery word from Latin lingua