Englishfor English speakers
propagation
—
noun
the spreading of something (a belief or practice) into new regions
—
noun
(= generation)
the act of producing offspring or multiplying by such production
—
noun
the movement of a wave through a medium
step
Verb
—
When you step, you move one foot.
When you walk, you step many times.
If you step on the ant, it will be dead.
step
Noun
—
A step is a movement of the foot
Take one step forward to win the game.
—
A step is one of several actions or processes taken to achieve a goal.
Heating the oven is one step needed to bake bread.
—
A step is a surface used to walk upwards. Most often there are several steps, one above the other.
One must walk up the steps to get to the top of the building.