n. nostalgia, homesickness
phr. There is nothing to worry about, be happy!
phr. Don't worry, father will help us in finding jobs.
v. don't worry
n./adj. sorrow, sadness; distressed, sorrowful
phr. (ancient poem) At moonset cry the crows , streaking the frosty sky; Dimly lit fishing boats 'neath maples sadly lie. (poem "Mooring by Maple Bridge at Night" written by Zhang Ji in Tang Dynasty, translated by Xu Yuanchong)