the wick of [a candle/lamp]
wick 是可数名词，表示某物的灯芯时用 the wick of...。
The wick of the candle is too short to light.
这根蜡烛的烛芯太短，点不着。
灯芯；烛芯；油绳
wicks — plural of wick
蜡烛、煤油炉、油灯等中由纤维或多孔材料(通常为捻或织的棉)制成的条状物,一端吸取液态燃料(如蜡或油),另一端点燃以产生火焰。
a piece of cord or loosely woven material that draws liquid up by capillary action; especially the cord in a candle or oil lamp that carries fuel to the flame
蜡烛、煤油炉、油灯等中由纤维或多孔材料(通常为捻或织的棉)制成的条状物,一端吸取液态燃料(如蜡或油),另一端点燃以产生火焰。
A braid or bundle of fibre or other porous material (now generally twisted or woven cotton) in a candle, kerosene heater, oil lamp, etc., that draws up a liquid fuel (such as melted tallow or wax, or oil) at one end, to be ignited at the other end to produce a flame.
Before lighting the candle, I trimmed the wick.
点蜡烛之前，我把烛芯修剪了一下。
用法提示：此处 wick 是名词，指蜡烛的烛芯。
The old oil lamp needs a new wick.
这盏旧油灯需要一根新灯芯。
用法提示：wick 作名词，指油灯里吸油的灯芯。
A long wick can make the candle burn too quickly.
灯芯太长会让蜡烛烧得太快。
用法提示：wick 作名词，指蜡烛的灯芯；此处用单数形式。
wick 是可数名词，表示某物的灯芯时用 the wick of...。
The wick of the candle is too short to light.
这根蜡烛的烛芯太短，点不着。
常用动词 trim（修剪）或 replace（更换）与 the wick 搭配。
You should trim the wick before lighting the lamp.
点灯之前你应该修剪灯芯。
说明材质时可用 a wick made of...，也可说 a cotton wick。
This oil lamp has a wick made of cotton.
这盏油灯的灯芯是棉质的。
candlewick 专指蜡烛的芯；一般不用来指油灯芯。
lampwick 专指油灯或煤油灯的芯；指蜡烛芯时通常用 wick 或 candlewick。
grammar · medium
易错句子The candle's heart is too short, so it burns out quickly.
正确表达The candle's wick is too short, so it burns out quickly.
中文「灯芯」的「芯」容易直译为 heart/core，但英语中蜡烛或油灯的灯芯用 wick，不能用 heart。
grammar · medium
易错句子There is wick in the candle.
正确表达There is a wick in the candle.
wick 是可数名词，单数前需要不定冠词 a；汉语没有冠词，所以容易漏掉。
grammar · medium
易错句子The candle has a wicked inside.
正确表达The candle has a wick inside.
wicked 是形容词（或动词 wick 的过去式），不能作名词表示「灯芯」；名词单数应为 wick。
wick 是名词“灯芯”，指蜡烛或油灯中吸油的绳子；wicked 是形容词，读作 /ˈwɪkɪd/，意为“邪恶的、淘气的”，不能当名词“灯芯”用。
wick 指“灯芯”；wicker 指“柳条、藤条”这种编织材料，可作名词或形容词（如 wicker basket），读音比 wick 多一个 /ər/，意思也与灯芯无关。
wick 指“灯芯”；wicket 是名词，拼写多 -et，指“小门、售票窗口、（板球）三柱门”，和“灯芯”意思完全不同。
蜡烛烛芯
Please don't cut the candle wick too short.
请不要把蜡烛烛芯剪得太短。
灯芯
The lamp wick needs to be replaced.
这盏灯的灯芯需要更换。
修剪烛芯
Trim the wick to about five millimeters before lighting the candle.
点燃蜡烛前，把烛芯修剪到大约五毫米。
点燃烛芯
She lit the wick with a match.
她用火柴点燃了烛芯。
棉灯芯
A cotton wick works well in an oil lamp.
棉灯芯在油灯中很好用。
惹恼某人；使某人心烦
The constant noise from the construction site is starting to get on my wick.
建筑工地持续的噪音开始让我心烦了。
（男子）性交（粗俗俚语）
He often jokes about dipping his wick, which makes his colleagues uncomfortable.
他常拿做爱开玩笑，这让同事们很不舒服。
Dictionary facts from ECDICT, WIKTIONARY.