圈
JLPT HSK 5

juān, juàn, quān
Outside: enclosure 囗, inside: spool 卷 (security guard 龹 [person 人 with high lifted arms 丷 and two barrier bars 二], slumped person 㔾)
In an enclosure a guard secures a slumped person, that is confined.

	卷
JLPT HSK 5

juǎn, juàn
Top: security guard 龹 (Here: roll with spindle ノ and sth. wound 二 around), bottom: crouching person 㔾
Roll on which something, like a crouching person, is rolled on.

	倦
JLPT HSK 6

juàn
Left: person 亻, right: reel, spool 卷 (security guard 龹 [= person 人 with high lifted arms 丷 and two barrier bars 二], slumped person 㔾-)
When a person as a security guard lifted the arms and then slumps down, he is tired.

	蜷
JLPT no HSK

quán
Left: insect 虫, right: to roll (up), reel 卷 (Spindle ノ on which something 二, like a crouching person 㔾, is rolled on.)
The insect is 'rolled up', when it curls.