acting on sudden desires or feelings without thinking about the consequences beforehand
"He is impulsive."
"The impulsive teenager bought an expensive guitar with his savings without thinking about whether he would actually have time to learn how to play it."
irritable/ˈɪɹətəbəɫ/adjective
prone to annoyance or frustration
"She is irritable."
"The irritable old man shouted at the children who were playing near his house because their laughter and shouting bothered him while he was trying to nap."
grumpy/ˈɡɹəmpi/adjective
having a bad-tempered or irritable mood
"My father is grumpy."
"The grumpy cashier did not smile at any customers and she slammed their change on the counter as if she were angry at the whole world."
spiteful/ˈspaɪtfəɫ/adjective
showing a desire to harm, annoy, or hurt someone on purpose
"Her comment was spiteful."
"The spiteful classmate spread rumors about the new student because she was jealous that everyone liked him more than they liked her."
insolent/ˈɪnsəɫənt/adjective
showing a rude and disrespectful attitude or behavior
"The child is insolent."
"The insolent teenager rolled his eyes at his teacher and told her that her class was useless and that he did not need to learn anything from her."
Learn all 5 words in this list with spaced repetition