1
loosen sth
及物用法，后接具体物体。
He loosened his tie.
他松开了领带。
放松，松开，解除
loosens — third person singular of loosen
先理解核心含义，再看它在真实句子里的用法。
放松，松开，解除
make loose or looser; relax or release
He loosened his tie.
他松开了领带。
使松散。
To make loose.
变得松散。
To become loose.
松开(约束装置)。
To disengage (a device that restrains).
变得松开或解开。
To become unfastened or undone.
loosen
Base
原形
loosens
3rd person
第三人称单数
loosening
-ing
现在分词
loosened
Past
过去式
loosened
Past participle
过去分词
He loosens the knot.
他松开了结。
He tried to loosen the tight knot.
他试图松开那个紧结。
The government decided to loosen the restrictions.
政府决定放宽限制。
The screw had loosened over time.
螺丝随时间推移变松了。
及物用法，后接具体物体。
He loosened his tie.
他松开了领带。
不及物短语动词，意为放松。
She needs to loosen up and enjoy the party.
她需要放松一下，享受派对。
比喻用法，后接抽象名词。
The government loosened the restrictions on travel.
政府放宽了旅行限制。
Not this
I need to loose my tie.
Use this
I need to loosen my tie.
“loose”是形容词，表示“松的”，而“loosen”是动词，表示“使变松”。这里需要动词来表达“松开领带”的动作。
Not this
I loosened my phone yesterday.
Use this
I lost my phone yesterday.
“loosen”意为“松开”，而“lose”意为“丢失”。根据句意，应该是“丢失了手机”，所以应使用“lost”。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
放松；（使）放松
He needs to loosen up and enjoy himself.
他需要放松一下，享受生活。
松开领带
After work, he loosened his tie and sighed.
下班后，他松开领带，叹了口气。
放宽限制
The government decided to loosen restrictions on travel.
政府决定放宽旅行限制。
松开手；放松控制
She loosened her grip on the rope and let it slide.
她松开绳子，让它滑落。
拧松螺丝
Use a screwdriver to loosen the screws on the cover.
用螺丝刀拧松盖子上的螺丝。
放松管制
Many industries want the government to loosen regulations.
许多行业希望政府放松管制。
放松，变得不那么拘谨
He needs to loosen up and enjoy the party.
他需要放松一下，享受派对。
使某人开口说话；酒后吐真言
A few drinks loosened his tongue and he told us everything.
几杯酒下肚，他打开了话匣子，告诉了我们一切。
增加开支；出手大方
The company finally loosened the purse strings and invested in new equipment.
公司终于放宽了预算，投资了新设备。
解开我的纽扣，宝贝
After the party, she asked him to loosen her buttons.
派对结束后，她让他帮她解开纽扣。
Use loosens naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记住 loosen = loose（松的） + en（使），使其变松，松开鞋带就用它。
[object Object]
Collins 词频等级为 2，建议结合例句记忆，而不是只背中文释义。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.