Sugiru (過ぎる）.

That line 時過ぎて has me thinking. I've always heard of 過ぎる as meaning going beyond or too much, but now I see that it can also mean passing, as in time. Henshall先生 says the kanji depicts movement (the radical shinnyuu/shinnyou) and vertebrae, with some uncertainty about the kuchi. He says the tsukuri carried a phonetic sense of substantiality.