nail, tack, peg
釘 centers on a small metal fastener used to join or hang things: a nail, tack, or peg.
釘 combines 金 (metal) with 丁, which likely contributes the sound and may depict a nail-like shape. The character straightforwardly represents a metal nail or tack.
The left side is metal 金, and the right side 丁 looks like a nail with a flat head and a straight shaft. Picture a metal nail being hammered into wood.
For テイ, imagine a metal tack being hammered into a table: the sound 'tack' cues テイ, and the metal 金 radical reinforces the nail.
nail; spike; tack; rivet; brad; (pachinko) pin
nailing on; nailing down; nailing shut; being glued (to); being unable to take one's eyes (from)
long nail; spike
screw; screw spike
staple
the nail that sticks out gets hammered down; people that stick out too much get punished
brad; double-pointed nail
double-pointed nail; dowel
dowel; guide dowel
L-shaped nail; staple; small clamp
spike; very large nail
bent nail; crooked nail
peg
wooden peg
spike; dog nail
rivet on a sword hilt
bamboo nail (spike, peg, etc.)
having no effect; waste of effort
Holy Nail; relics claimed to be the nails used for Christ's crucifixion
large half-dome-shaped nail