ἐθελέχθρως
ἐθέλεχθρος, bearing one a grudge
Morpho works with a static database. If you like, you can compare the output of Morpheus.
Parsed as:
✓ adverb
masculine accusative plural (NCA)
feminine accusative plural (NCA) of
ἐθέλεχθρος
Other forms of ἐθέλεχθρος: ἐθελέχθρως