homeless, having no roof over one’s head ☊ like: vô gia cư → →
obdachlos ☊ 
vô gia cư ☊ 
无家可归的 ☊ wú jiā kě guī de der Obdachlose ☊ người vô gia cư ☊ ☊ obdachlos ☊ vô gia cư ☊ ☊ We collected money in behalf of the homeless. ☊ in behalf of sb, in sb's behalf ☊
She spoke with feeling about the plight of the homeless. ☊ feeling ☊
Homelessness is on the increase (= increasing). ☊ increase ☊
The number of homeless people has increased dramatically. ☊ number ☊
Many of those living on the streets are not officially homeless. ☊ officially ☊
Priority cases, such as homeless families, get dealt with first. ☊ priority ☊
shelter sb/sth: helping the poor and sheltering the homeless ☊ shelter ☊
street newspapers sold by the homeless ☊ street ☊
He was homeless, so we took him in. ☊ take sb in ☊