ruò​xiǎo

puny

弱小 ruò​xiǎo
puny adjective
small and weak; insignificant in size or power

He is small and frail, but his will is very firm.

vulnerable adjective
the small and weak, specifically referring to children or women and children

Society should care for vulnerable groups.

Frequency

Movie subtitles
3.64 per million appears in 2% of films
Written text
2.83 per million

Sources

Definitions
CC-CEDICT