HESITANCY
reluctance, hesitancy, hesitation, disinclination, indisposition
(noun) a certain degree of unwillingness; “a reluctance to commit himself”; “his hesitancy revealed his basic indisposition”; “after some hesitation he agreed”
hesitance, hesitancy
(noun) a feeling of diffidence and indecision about doing something
Source: WordNet® 3.1
Etymology
Noun
hesitancy (countable and uncountable, plural hesitancies)
A pausing or halting before beginning a task, often as a result of some fear or uncertainty about the outcome.
vaccine hesitancy.
Source: Wiktionary
Hes"i*tan*cy, n. Etym: [L. haesitantia a stammering.]
1. The act of hesitating, or pausing to consider; slowness in
deciding; vacillation; also, the manner of one who hesitates.
2. A stammering; a faltering in speech.
Source: Webster’s Unabridged Dictionary 1913 Edition