• biharmonic wave equation

द्वि:    double acting double helical gear double

द्वि निश्‍चर:    bi-invariant द्वि double acting double

निश्‍चर:    invariant

तरंग:    caprice fancy freak roller water wave maggot

तरंग समीकरण:    wave equation तरंग caprice fancy freak

समीकरण:    equation naturalization equalization