godan verb (-su)
keep crying; cry continuously
Emphasizes that the crying continues without stopping, often for a long time or despite attempts to stop.
赤ちゃんが夜中ずっと泣き通した。
The baby kept crying all through the night.
彼女は悲しくて、一晩中泣き通した。
She was so sad that she cried the whole night through.