shaking

describes a hand trembling involuntarily, a common sign of nervousness, weakness, or illness

brazo tembloroso

describes an arm trembling involuntarily, often due to fear, cold, or a medical condition

describe un brazo que tiembla involuntariamente, a menudo por miedo, frío o una condición médica

dedo tembloroso

describes a finger trembling involuntarily, perhaps when pointing or due to a tremor

describe un dedo que tiembla involuntariamente, quizás al señalar o debido a un temblor