Skilled or able to use either hand, with unspecified degrees of equalness; ambidextrous. / Denoting either right-handed or left-handed; either-handed. / For use with both hands or using both hands.

With both hands / Involving two sides or approaches

Using both hands.

Ambidexterity. / The property of involving two sides, approaches, or orientations.

plural of Both respirator

(historical) An early form of iron lung.

(informal, figuratively) The maximum damage that a weapon can deliver.

(colloquial) That which belongs to both of us; the possessive first-person pronoun used without a following noun.

(colloquial) That which belongs to both of you; the possessive second-person pronoun used without a following noun.

(derogatory) To engage in bothsidesism, to treat a policy debate or controversy as a conflict between two equally valid (or equally dangerous, etc) viewpoints.