off‧set1 past tense and past participle offset, present participle offsetting [transitive]
if the cost or amount of something offsets another cost or amount, the two things have an opposite effect so that the situation remains the same:
Cuts in prices for milk, butter, and cheese will be offset by direct payments to farmers.
offset something against something
He was able to offset his travel expenses against tax.
to make something look better by being close to it and different:
His blonde hair offset a deep tan.