作
JLPT HSK 1

zuò
Left: a person 亻, right: suddenly, unexpectedly 乍 (The saw 乍 fells [the tree] suddenly.)
The person has a saw to make something.

	怎
JLPT HSK 1

zěn
Top: suddenly 乍 (The saw 乍 fells/chops [the tree] suddenly.), bottom: heart 心
The saw sawed the heart. - What now?

	昨
JLPT HSK 1

zuó
Left: sun/day 日, right: suddenly 乍 (The saw 乍 fells [the tree] suddenly.)
(At midnight:) The present day is "sawn" into yesterday.

	炸
JLPT HSK 5

zhá, zhà
Left: fire 火, right: suddenly 乍 (The saw 乍 fells [the tree] suddenly.)
(Due to the higher temperature:) With fire it is very fast (=sudden) to prepare food if you: deep fry.

	窄
JLPT HSK 5

zhǎi
Top: hole, cavity 穴 (It is covered 宀 and a narrowing path 八 leads into the cave.), bottom: suddenly 乍 (The saw 乍 fells [the tree] suddenly.)
(Unlike an axe, which choppes out a wedge.) The cavity (= slit or notch) made by a saw is narrow.

	诈
JLPT HSK 6

zhà
Left: word 讠/言, right: suddenly 乍 (The saw 乍 fells [the tree] suddenly.)
If the words are sawed (=fiddled), the person is cheating.

	咋
JLPT HSK 6

zǎ, zé, zhà, zhā
Left: mouth 口, right: suddenly 乍 (The saw 乍 fells [the tree] suddenly.)
The mouth asks suddenly: Why?

	榨
JLPT HSK 6

zhà
Left: tree 木, right: narrow 窄 (The opening 穴 [= slit/notch] made by a saw 乍 is narrow.)
If the tree shall pass through the narrow, it must be squeezed.

	乍
JLPT no HSK

zhà
Image of a saw
The saw fells [the tree] suddenly and unexpectedly.

	锯
JLPT no HSK

jū, jù
Left: metal 钅/金, right: reside, live 居 (Where the buttock 尸 [side view] becomes old 古, he has his residence.)
It's made of metal and you use it where you reside: a saw.