大声疾呼

to call loudly (idiom); to get people's attention / to make one's views known

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

loud voice / in a loud voice / loudly

sound / voice / tone / noise / reputation / classifier for sounds

(bound form) disease; ailment / (bound form) swift / (literary) to hate; to abhor

to call / to cry / to shout / to breath out / to exhale

variant of 呼[hu1] / to shout / to call out