IPA: /tɛkˈtɒnɪkli/
KK: /tɛkˈtɑnɪkli/
In a way that relates to the movement and structure of the Earth's crust and tectonic plates.
The mountains were formed tectonically over millions of years due to the shifting of the Earth's plates.
Tectonically → It is formed from "tecton" (from Greek "tekton", meaning builder or carpenter) and the suffix "-ically" (meaning in a manner relating to). The word "tectonically" refers to something that relates to the structure or movement of the Earth's crust, as if it were being built or shaped.
Think of a 'builder' ('tecton') shaping the Earth, and remember that 'tectonically' means relating to the structure and movement of the Earth's crust.