FROM STRONG’S GREEK DICTIONARY (1890)

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

hileos ἵλεως — hil'-eh-oce — perhaps from the alternate form of 138; cheerful (as attractive), i.e. propitious; adverbially (by Hebraism) God be gracious!, i.e. (in averting some calamity) far be it:--be it far, merciful.

see GREEK for 138