"reluctance" in the noun sense
physics) opposition to magnetic flux (analogous to electric resistance)
2. reluctance, hesitancy, hesitation, disinclination, indisposition
a certain degree of unwillingness
"a reluctance to commit himself"
"his hesitancy revealed his basic indisposition"
"after some hesitation he agreed"
Source: WordNet® (An amazing lexical database of English)
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