shave
剃 centers on removing hair with a blade: shaving. The meaning is straightforward and specific.
剃 combines 弟 (which likely contributes the sound) with 刂 (knife), suggesting the action of cutting or shaving with a blade.
The left side 弟 looks like a younger brother, and the right side 刂 is a knife. Picture a younger brother shaving with a knife: 剃 means shave.
For テイ, imagine a younger brother shaving while wearing a T-shirt: T -> テイ, and the knife 刂 does the shaving.
to shave
razor
tonsure; shaving one's head (upon entering the Buddhist priesthood)
Occam's razor; Ockham's razor
Hanlon's razor ("Never attribute to malice that which can be adequately explained by stupidity")
barber's apprentice
shaving the very top of the head
freshly shaven
shaving ability (of a razor); shaving performance
missed spot (in shaving); unshaven hairs
to shave off (hair)
stubble (after shaving)
hair shaved short in a V shape at the temples; hair shaved at the corners of the forehead
high and broad forehead
razor burn; razor rash
one who sharpens razors
razor strop; hone
shaving
safety razor
shaver; razor