to sink, to submerge, to immerse, to keep down
Left: water 氵, right: superfluous 冗 (A tablecloth 冖 on the table 几 is superfluous.)
In the water, the waste (= that what is superfluous) will sink.
shell, carapace, crust (earth's crust etc)
Top: scholar 士, bottom: superfluous 冗 (A tablecloth 冖 on the table 几 is superfluous.)
The scholar places a tablecloth on the table as a "shell" or carpace.
superfluous, extraneous, redundant, busy
Top: cover 冖 (here: tablecloth), below: table 几
A tablecloth on a table is: superfluous.
To the Trainer