noun. A setting in.

noun. Something inserted or set in, as lace, etc., in garments.

verb. Present participle of insert.

noun. Something inserted or set in, such as lace in garments.

"By no means does the film attempt to demonize the unions, but it does show the role they play in inserting loopholes into contracts designed to make it almost impossible to get rid of ineffective teachers."

alerting  asserting  averting  converting  disconcerting  

insert