FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

aganakteo ἀγανακτέω — ag-an-ak-teh'-o — from agan (much) and achthos (grief; akin to the base of 43); to be greatly afflicted, i.e. (figuratively) indignant:--be much (sore) displeased, have (be moved with, with) indignation.

see GREEK for 43