捂[摀]wǔ

 (遮盖； 封闭) cover; muffle; seal; wrap up: ～ 着耳朵 stop one's ears; ～ 上眼睛 muffle one's eyes; ～ 盖子 keep the lid on; cover up the truth; keep secret
另见 see also wú。
◆ 捂捂盖盖 [方] try to cover up; 捂钻 pump drill