abwechselnd inglês:

Walk means to move on foot by advancing feet alternately

It's alternately sunny and rainy outside -- I don't know what to wear!

Day and night come alternately.

"You Excellency, please," Arihnda said carefully, backing toward the door, her lungs alternately burning and icing with the bits of spice she'd accidentally inhaled.

alternating current

Alternation - this is achieved by alternating shapes, sizes or motifs.