Dismissive (adjective)

1. Tending to dismiss or reject as unimportant or insignificant.
2. Showing indifference or disrespect.

Origin:

From the middle english dismissen, from the old french desmettre, from the latin dimissus, from dis- + mittere to send.

Examples:

1. He gave a dismissive wave of his hand when asked about the proposal.
2. The teacher"s dismissive attitude towards the student"s questions made it clear that he did not value their input.
3. The CEO's dismissive attitude towards the new product idea caused it to be abandoned.
4. The politician"s dismissive response to the voter"s concerns made it clear that he was not taking them seriously.
5. The doctor"s dismissive attitude towards the patient"s symptoms caused them to be misdiagnosed.