Grieve
Mourn
トウ
いた
喪 (ソウ、も) Mourning
悼 (トウ、いた) Grieve, Mourn
忌 (キ、い) Mourning
卓 (タク) Table
ト is the katakana と, so having トウ as the on'yomi reading isn't too much of a stretch...stretch because it's a loong トウ