阵痛 zhèntòng labor pains Definitions Defs Origin Strokes Stroke Words Sentences Sents 阵 陣 zhèn numeral [short duration] Used for events, states, or natural phenomena that last for a short period of time, such as a burst of rain, a round of applause, or a spell of pain.痛 tòng adjectivenoun painful physically painful; to ache; to feel a sore or sharp pain