0 in a way that is unkind, cruel, and without sympathy or feeling for other people: --
She was callously indifferent to the suffering of those she made jobless.
He callously uses the people around him.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Можем да го завършим стъпка по стъпка, колкото и дълъг да е пътят и не може да бъде завършен, колкото и кратък да е пътят, ако дори не маркирате отпечатъка си.