wilfully
2 occurrences across the corpus
King James Version
Hebrews 10:26
For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,
KJV Apocrypha (Catholic Deuterocanon)
2 Maccabees 14:3
Now one Alcimus, who had been high priest, and had defiled himself wilfully in the times of their mingling with the Gentiles, seeing that by no means he could save himself, nor have any more access to the holy altar,