底荷 is read as そこに (sokoni) and means ballast.
そこに
sokoni
そこ
bottom
そこいれ
bottoming out (of prices)
そこぢから
hidden reserves of strength
ていりゅう
bottom current
そこうち
bottoming out
ていへん
base (of a polygon)
そこね
bottom price
そこぬけ
bottomless (bucket, etc.)
そこびえ
penetrating cold
ていせいどうぶつ
benthic animal
そこいじ
latent disposition
ていせいせいぶつ
benthic organism