錐 - auger, drill, awl

cone; pyramid

cream rises to the top; a drill in a bag (will always poke through)

boring; drilling

conical surface

pyramid

tailspin; spin

the slightest bit of room; room to stand a gimlet (on its end)

tightly packed; full to capacity; jam-packed

pentagonal pyramid

(circular) conical surface

anatase; octahedrite

cone cell; cone