This is the 13926th most frequent Russian word.
образовался
"Formed" or "was formed."
The verb 'образовался' is used to describe the occurrence or formation of something, in this case, ice forming on the water's surface.
На поверхности воды образовался лед.
Ice has formed on the surface of the water.
Here, 'образовалась' indicates the formation or appearance of something due to an external event, such as rainfall causing a puddle.
На дороге после дождя образовалась лужа.
A puddle has formed on the road after the rain.
The verb 'образовался' is used metaphorically to describe the establishment of a relationship or connection, in this instance, a friendly alliance.