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Trainer

//ˈtɹeɪnɚ// noun, slang

Noun

1
A person who trains another; a coach.
"It was [Roger] Federer’s ability to pull him around the court that put the lactic acid and debilitating weight in those legs and he should not have been allowed the luxury of his trainer’s help."
2
simulator consisting of a machine on the ground that simulates the conditions of flying a plane wordnet
3
A person responsible for treating injuries sustained by players during matches; a physiotherapist.
"He served Nelson wholeheartedly as a player, coach and trainer in a lengthy association, the highlights being his involvement in two championship-winning sides."
4
one who trains other persons or animals wordnet
5
A running shoe or sneaker. Ireland, UK

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6
A patch for a video game that applies cheats. slang
"I actually never got a trainer for RCT, but needed one for my brother when I installed it on his computer. He is 10, and is only concerned with making "cool" coasters. I also completed CF before getting trainers."
7
A piece of indoor equipment allowing a bicycle to be ridden while stationary.
8
A device for encouraging the roots of a plant to grow in a certain direction.
"a root trainer"
9
Attributive form of trainers. attributive, form-of
"There was chewing gum stuck to my trainer soles."

From train + -er.

Unscramble this word: trainer