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
of
Preposition
—
Made using.
It is a house of cards.
explosive
Noun
—
An explosive is a material that explodes and is used to make explosions.
explosive
Adjective
—
If something is explosive, it can explode easily.
—
If something is explosive, it is become dangerous or bad easily.
—
If something is explosive, it is very exciting.
wave
Noun
—
A wave is the motion of water up and down.
wave
Verb
—
To move from side to side again and again.
The flag waved in the wind.