Definify.com

Webster 1913 Edition

Noun.

[L.

haesitantia

a stammering.]

The act of hesitating, or pausing to consider; slowness in deciding; vacillation; also, the manner of one who hesitates.

A stammering; a faltering in speech.

Noun.

[See Hesitate.] A doubting; literally, a stopping of the mind; a pausing to consider; dubiousness; suspense.

The reason of my hesitancy about the air is--

hesitancy ‎(plural hesitancies)

A pausing or halting before beginning a task, often as a result of some fear or uncertainty about the outcome.