者
zhě
(after a verb or adjective) one who (is) ...
(after a noun) person involved in ...; -er; -ist; (used after a number or 後|后[hou4] or 前[qian2] to refer to sth mentioned previously); (used after a term, to mark a pause before defining the term); (old) (used at the end of a command); (old) this
elder (耂) + day/sun (日) = one who does or is [something]
耂 evokes an elder, and 日 here is primarily phonetic, lending the zhě sound. Together the character became a general suffix meaning 'one who' — the elder figure hints at a person defined by their role or status.
医生是帮助病人的工作者。
yī shēng shì bāng zhù bìng rén de gōng zuò zhě。
Doctors are workers who help sick people.
学习一门语言，初学者需要多练习。
xué xí yī mén yǔ yán，chū xué zhě xū yào duō liàn xí。
When learning a language, beginners need to practice more.
Words with 者
两者
liǎng zhě
both of them; the two of them
来访者
lái fǎng zhě
visitor
被害者
bèi hài zhě
victim (of a wounding or murder)
亡者
wáng zhě
the deceased
合作者
hé zuò zhě
co-worker
示威者
shì wēi zhě
demonstrator
忍者
rěn zhě
ninja
更有甚者
gèng yǒu shèn zhě
furthermore (idiom)
贡献者
gòng xiàn zhě
contributor
创作者
chuàng zuò zhě
creator; author
幸存者
xìng cún zhě
survivor
所有者
suǒ yǒu zhě
proprietor