inertial
Inertial (adjective) means relating to or based on inertia. Example: “Submarines use inertial navigation systems that don't rely on satellites.”
How to use inertial
Learner’s notesIn plain EnglishDescribing something to do with inertia, as in the science or engineering sense.
Fill the gap
Can you complete this real example?
Submarines use _____ navigation systems that don't rely on satellites.
Etymology
From inertia + the adjective-forming suffix -al.