Where does “Lententide” come from?

Lententide (English) comes from English Lenten, from English -en, from Middle English -en, from Old English -en, from Old Norse -inn, from Proto-Norse -īna-, from Proto-Germanic -īnaz, from Proto-Indo-European -iHnos — adjectival suffix.

Ancestry of “Lententide”, step by step

Lententide traces back through two separate lines of ancestry.

via English Lenten

StepLanguageWordMeaning
1EnglishLentenPertaining to Lent; taking place during Lent;...
2English-enDenotes the past participle form when attached to...
3Middle English-enDenotes the past participle form when attached to...
4Old English-enmæġþ + API → mæġden; cocc + API → cycen, cicen;...
5Old Norse-innUsed to create adjectives from nouns, meaning...
6Proto-Norse-īna-
7Proto-Germanic-īnaz-en
8Proto-Indo-European-iHnosCreates adjectives of materials
9Proto-Indo-European-no-adjectival suffix

via English tide

StepLanguageWordMeaning
1EnglishtideThe periodic change of the sea level,...
2Middle EnglishtydeA time (period), season
3Old Englishtīdtime, period, season; period, season, time;...
4Proto-Germanictīdiztime; period, interval
5Proto-Indo-Europeandéh₂itisinterval, period of time
6Proto-Indo-Europeandeh₂y-to share, divide
7Proto-Indo-Europeandeh₂-to share, divide
Every word from Proto-Indo-European -no-Every word from Middle English -enEvery word from English -en