詩 is built from the 言, 申, and 寺 components.
It reads シ like 寺, as do 時, 持, and 侍 — learn 寺 once and the family's reading comes with it.
A common word using 詩 is 詩 (し), meaning “poem; poetry”.
Don't confuse it with 待, 持, 特, and 侍 — The right side 寺 is shared; the left radical carries the meaning: 彳 wait, 扌 hold, 牛 special, 亻 attend, 言 poem