More common in modern Chinese political or formal contexts, especially in phrases like 向人民呼籲 ("to appeal to the people").
Shares meaning and usage domain with 

to call, to cry out, to shout, to exhale, breathe out

 (호, to call) but carries a stronger nuance of pleading or earnest appeal.

bamboo

 (죽, bamboo) – semantic component; appears as a radical in words related to sounds, writing, and tools
龥 (부르짖을 유) – phonetic component, provides sound and reinforces the meaning of calling out

Rare in everyday Korean and Japanese usage; mainly seen in Sino-Korean compounds such as 呼籲 (호유).
呼籲 (호유) — to appeal, to call upon
籲請 (유청) — to request earnestly, to appeal to
籲告 (유고) — to proclaim, to announce with appeal

Characters

Words

Vocabulary

pipe, tube, to manage, to control, to be responsible for, to guarantee

box, chest, case, trunk, container

joint, node, section, festival, to economize, to be temperate

pattern, law, norm, model, standard

book, chapter, section

to build, to pile up

bamboo slip, letter, document, simplicity, to select, to be simple or concise

a lottery slip, divination lot

to cry out loudly, to appeal, to call out, to invoke, to implore

powder, flour, cosmetic powder

grain, particle, granule, small unit

porridge, gruel, boiled rice, (archaic) to sell or trade

refined, pure, essence

sugar, candy, sweets

provisions, grain, food supply, rations

to tie, fasten, connect, relate

head rope, cord, thread, guiding principle, rule, order

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Chinese character

Explore 214 Chinese radicals and their derived characters. Sort by radical or stroke count, and view the complete list of official Hanja radicals.

Chinese characters (Hanja)

Chinese characters dictionary

籲

Etymology

Usage in Korean

Additional notes

Neighboring characters in the dictionary

References