She gently placed the snuffer over the candle flame to extinguish it.

snuffer 是由动词 snuff（熄灭）加上后缀 -er 构成的名词，指"用来熄灭蜡烛的工具"，即"烛罩"或"熄烛器"。这个词特指那种罩在烛焰上隔绝氧气来熄灭蜡烛的小器具。