upsetting
verb
Definitions
To make (a person) angry, distressed, or unhappy.
Example: I’m sure the bad news will upset him, but he needs to know.
To disturb, disrupt or adversely alter (something).
Example: Introducing a foreign species can upset the ecological balance.
To tip or overturn (something).
To defeat unexpectedly.
Example: Truman upset Dewey in the 1948 US presidential election.
noun
Definitions
The action of the verb upset.
adjective
Definitions
Causing upset; distressing.
Example: He found taking his cat to the vet to be put down very upsetting.
Conceited; presumptuous.