head / chief / first (occasion, thing etc) / classifier for poems, songs etc

= + : In the outhouse, the chief lends his piece pipe to Sherlock Holmes. Sherlock smokes some weed in the pipe and looks at himself in a hand mirror, thinking that he's uber cool and that he'd pass as a quite formidable chief himself.

首 character breakdown

self / oneself / from / since / naturally / surely

= + : Mnemonic symbol: a hand mirror, which someone uses to look at themselves.

The Eye of Providence (目) is looking at itself (自) in a handheld mirror (自) in the space station's bathroom (Ø4). It think it's indeed looking very good, since Zorro (z) attached a petal (丶) to its eye (目).
Character component without intrinsic meaning

= + : Mnemonic symbol: weed. A crocodile (丷) is smoking weed (䒑) in a flute (一).

Characters with 首 as component

road / path / CL:條|条[tiao2],股[gu3] / principle / truth / morality / reason / skill / method / Dao (of Daoism) / to say / to speak / to talk / classifier for long thin things (rivers, cracks etc), barriers (walls, doors etc), questions (in an exam etc), commands, courses in a meal, steps in a process / (old) circuit (administrative division)

= + : The chief and Don Quixote decided to follow the path of the Dao in the aorta's bathroom. They wear gladiator sandals and meditate sitting on the floor of the bathroom, envisioning the path to enlightment.
cheekbone / crossroads / high
bow of a ship
(literary) to cut off the left ear of a slain enemy / the severed ear of a slain enemy

Words with 首

afraid of the head, terrified of the tail (idiom); ever fearful and nervous / afraid of the slightest thing
Jieshou, county-level city in Fuyang 阜陽|阜阳[Fu4 yang2], Anhui
Jieshou, county-level city in Fuyang 阜陽|阜阳[Fu4 yang2], Anhui
extremely angry / infuriated / enraged / headache caused by anger
(of a couple) to grow old together in mutual respect (idiom)
white head of hair / fig. old person
white hair and gray sunken cheeks (idiom); decrepit old age
Shishou, county-level city in Jingzhou 荊州|荆州[Jing1 zhou1], Hubei
Shishou, county-level city in Jingzhou 荊州|荆州[Jing1 zhou1], Hubei
chief executive of Special Administrative Region (Hong Kong or Macao) / abbr. for 特別行政區首席執行官|特别行政区首席执行官

Sentences with 首

rú
ji̅n
 
 
ǎn
lǎo
su̅n
dào
zuò
le
gè
shǒu
xí