start
/ˈstärt/
verb
to move suddenly and violently : spring
to react with a sudden brief involuntary movement
to issue with sudden force
started angrily to his feet
started when a shot rang out
noun
a sudden involuntary bodily movement or reaction
a brief and sudden action or movement
a sudden capricious impulse or outburst
woke with a start
abbreviation
strategic arms reduction talks