an involuntary movement, etc. is made suddenly, without you intending it or being able to control it 无意识的；不自觉的 an involuntary cry of pain 不由自主的痛苦的喊叫
happening without the person involved wanting it to 非自愿的；非本意的 the involuntary repatriation of immigrants 对移民的强制性遣返 involuntary childlessness 出于无奈的无子女状况 The distinction between voluntary and involuntary unemployment is often blurred. 自愿失业和非自愿失业之间的区分往往很模糊。