to prevent someone from achieving success by destroying their plans

to give someone an opportunity to act freely with the intention of hurting them

to not easily give a person something that they need or want from one

to prevent someone from achieving what they want by creating problems for them

to ruin what someone has planned or not allow them enjoy something

to slow down a plan or activity or prevent it from going on

to do something that makes oneself overly worried or confused

to cause problems, often by ruining or interrupting something that was planned

to complicate a simple situation

to make an attempt to prevent something from continuing or happening

to do something, particularly something others do not expect, in order to make them feel less confident or important

to cause a situation to become less hopeful or enjoyable

a person or thing that ruins an otherwise positive or enjoyable situation

to lessen or decrease the enjoyment, strength, or activity of something

to cause something to be less enjoyable as it could be