Where does “cryptotephra” come from?

cryptotephra (English) comes from English tephra, from Ancient Greek τέφρα, from Proto-Indo-European dʰegʷʰ- — to burn; warm, hot.

cryptotephra (English): volcanic ash that is hidden under other strata

Definitions

  1. volcanic ash that is hidden under other strata

Ancestry of “cryptotephra”, step by step

cryptotephra traces back through two separate lines of ancestry.

via English tephra

StepLanguageWordMeaning
1EnglishtephraThe solid material thrown into the air by a...
2Ancient Greekτέφραashes, as of the funeral pyre
3Proto-Indo-Europeandʰegʷʰ-to burn; warm, hot

via English crypto

StepLanguageWordMeaning
1EnglishcryptoA secret supporter or follower; Cryptography;...
Every word from Proto-Indo-European dʰegʷʰ-Every word from Ancient Greek τέφραEvery word from English tephra