Where does “deeply” come from?

Deeply comes from Old English dēoplīċ, an adverbial form of dēop meaning deep, with the suffix -līċe forming adverbs to express the manner or quality of being deep.

deeply (English): At depth, in a deep way; To a deep extent;...

Definitions

  1. At depth, in a deep way; To a deep extent;...

Ancestry of “deeply”, step by step

StepLanguageWordMeaning
1Middle EnglishdeplyDeeply, intensely, fully; to a great extent
2Old Englishdēoplīċedeeply
3Old English-līċely (adverbial suffix)
4Old English-eforming adverbs from adjectives; -ly
5Old English-enmæġþ + API → mæġden; cocc + API → cycen, cicen;...
6Old Norse-innUsed to create adjectives from nouns, meaning...
7Proto-Norse-īna-
8Proto-Germanic-īnaz-en
9Proto-Indo-European-iHnosCreates adjectives of materials
10Proto-Indo-European-no-adjectival suffix
Every word from Proto-Indo-European -no-Every word from Proto-Germanic -īnazEvery word from Old English -en