a certain degree of unwillingness; "a reluctance to commit himself"; "his hesitancy revealed his basic indisposition"; "after some hesitation he agreed"ある程度の不本意不本意
例:a reluctance to commit himself 正体を明らかにすることに対して気が進まない
(physics) opposition to magnetic flux (analogous to electric resistance)(電気抵抗に類似した)磁束に対する抵抗磁気抵抗