"sinning" in the noun sense
1. sin, sinning
an act that is regarded by theologians as a transgression of God's will
"sinning" in the verb sense
1. sin, transgress, trespass
commit a sin violate a law of God or a moral law
2. drop the ball, sin, blunder, boob, goof
commit a faux pas or a fault or make a serious mistake
"I blundered during the job interview"
"sinning" in the adjective sense
transgressing a moral or divine law
"if it be a sin to covet honor, I am the most sinning soul alive"- Shakespeare
Source: WordNet® (An amazing lexical database of English)
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