ANTIKNOCK Antonyms

• a violent release of energy caused by a chemical or nuclear reaction

• the act of detonating an explosive

• the sound of knocking (as on a door or in an engine or bearing)

• negative criticism

• a vigorous blow

• a bad experience

• the act of hitting vigorously

• deliver a sharp blow or push

• rap with the knuckles

• knock against with force or violence

• make light, repeated taps on a surface

• sound like a car engine that is firing too early

• find fault with; express criticism of; point out real or perceived flaws

• repeated heavy blows

• an instance of rapid strong pulsation (of the heart)

• the act of pounding (delivering repeated heavy blows)

• a rapid series of short loud sounds (as might be heard with a stethoscope in some types of respiratory disorders)

• used to give emphasis

• extraordinarily good or great; used especially as intensifiers

• quick and energetic

• a rattling noise (often produced by rapid movement)

• make a rattling sound

• a sharp high-pitched resonant sound (as of a sonar echo or a bullet striking metal)

• a river in western Thailand; a major tributary of the Chao Phraya

• hit with a pinging noise

• sound like a car engine that is firing too early

• make a short high-pitched sound

• contact, usually in order to remind of something

• send a message from one computer to another to check whether it is reachable and active