sensation
[C/U] Both
pl: sensations
This word captures the immediate, raw impact of a stimulus, whether it is a physical nerve response or a social explosion. It suggests a sudden, vivid experience that commands attention, often bypassing slow deliberation in favor of an instinctive reaction.
Countable when referring to a specific physical feeling like a prickle or a chill. Uncountable when referring to the general capacity for feeling or the abstract state of being perceived.