Meaning
An intrusion of a ductile rock into an overburden.
Etymology
Origin: Ancient Greek
From Ancient Greek διαπειραίνω (diapeiraínō, “to pierce through”).
NYT Puzzle Appearances
No published puzzle dates on file for this word yet. It is part of the official NYT Spelling Bee word list for 2020, 2021, 2022, 2023, 2025.