匙 has two pronunciations: chí (spoon, as in 汤匙 tāngchí) and shi (key, as in 钥匙 yàoshi, where it is unstressed). It almost never appears alone — it's always part of a compound.
memory
The character contains 是 (shì) at the top and 匕 (bǐ, spoon radical) at the bottom — a spoon that IS a key.
