ἐκτυμπανώσεως
ἐκτυμπάνωσις, swelling out like a drum
Morpho works with a static database. If you like, you can compare the output of Morpheus.
Parsed as:
feminine genitive singular of ἐκτυμπάνωσις
No checked forms of ἐκτυμπάνωσις in the morphology database.