cyanide

"The prisoners were kept in a secure compound. "

"The box containing my old toys was stored in the attic. "

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"The computer technician fixed the broken printer in the school library. "

"He threatened me with a knife."

"The fertilizer contained potassium to help the plants grow stronger. "

"The detective investigated the theft of the school's valuable computer equipment. "

"The mushrooms growing in the park were poisonous, so we didn't pick any to eat. "

"The assassin poisoned the king."

"to suspect the presence of disease"

"Railway crossings without gates are highly dangerous."

"The long wait at the bus stop disgruntled the students, making them impatient and annoyed. "