thrust - A sudden or violent lunge with a pointed weapon or a bodily part
In the wrestling competition, Jerry's opponent had him pinned down, but with a strong thrust of his arms, Jerry pushed this opponent off of him, and then had his opponent pinned down instead.
impressionable - Easily influenced by somebody or something, usually due to being inexperienced or naïve.
Because children tend to be very impressionable, their use of the internet should be monitored, so that they are kept away form undesirble influences.
