অর্থ : An event in which one thing is substituted for another.
উদাহরণ :
The replacement of lost blood by a transfusion of donor blood.
সমার্থক : replacement, substitution, switch, transposition
অর্থ : The act of changing the arrangement of a given number of elements.
অর্থ : Complete change in character or condition.
উদাহরণ :
The permutations...taking place in the physical world.
অর্থ : Act of changing the lineal order of objects in a group.
Permutation meaning in Bengali (Bangla).