As mentioned in EIP-1153: Transient storage opcodes Specification
TLOADpops one 32-byte word from the top of the stack, treats this value as the address, fetches 32-byte word from the transient storage at that address, and pops the value on top of the stack.
In the context of stack, the use of word pop may be ambiguous. It would be better to replace it with the word put.