Where does “Längengrad” come from?

Längengrad (German) comes from German Länge, from Middle High German lenge, from Old High German lengī, from Proto-West Germanic *langī, from Proto-Germanic langį̄, from Proto-Germanic -į̄, from Proto-Indo-European -íh₂, from Proto-Indo-European -h₂ — Creates collective nouns, which refer to groups...

Längengrad (German): longitude

Definitions

  1. longitude

Ancestry of “Längengrad”, step by step

Längengrad traces back through two separate lines of ancestry.

via German Länge

StepLanguageWordMeaning
1GermanLängelength; longitude
2Middle High Germanlenge—
3Old High Germanlengīlength
4Proto-West Germanic*langīlength
5Proto-Germaniclangį̄length
6Proto-Germanic-į̄-th
7Proto-Indo-European-íh₂—
8Proto-Indo-European-h₂Creates collective nouns, which refer to groups...

via German grad

StepLanguageWordMeaning
1GermangradAlternative form of gerade
2Frenchgraderank; gradian
3Latingradusa step, pace; a stage, degree; a rank
4Proto-Italicgraðus—
5Proto-Indo-Europeangʰradʰ-—
Every word from Proto-Indo-European -h₂ →Every word from Proto-Germanic -į̄ →Every word from Proto-Germanic langį̄ →