jitters, nervousness; a feeling of fright or uneasiness (usually prec. by the )

Every time I have to make a speech, I get the jitters.

fluctuations in the image on a television screen or in copy received by facsimile transmission, caused by interference or by momentary failures of synchronization.

to behave nervously.

noun

calmness

noun

anxiety , dither , fidgets , heebie-jeebies , jumps , nerves , shakes , shivers , tenseness , willies , butterflies , fidgety , nervousness , uneasiness