台Taivo A Taiwan Mandarin dictionary

著床

zhuóchuáng

ㄓㄨㄛˊ ㄔㄨㄤˊ

Simplified 着床

1to lie down on a bed
2(physiology) implantation (attachment of a blastocyst to the lining of the uterus)
3(of an oyster larva) to attach to a substrate
4(fig.) to take root
5to become established

Keep 著床 and it comes back until you know it.