Lonely

adj. alone, solitary, without company; without friendly companionship; desolate, rarely frequented

Loneliness, the state of "feeling lonely", describes a human state or feeling involving isolation, etc. "Lonely" is also the name of four songs:"Lonely" (Merril Bainbridge song) is a 1998 single by Merril Bainbridge's second album Between the Days."Lonely" (Akon song) is a 2005 single by Senegalese singer Akon's album Trouble."Lonely" (Shannon Noll song) is a 2006 single from Shannon Noll's second album Lift."Lonely" is a 2007 song from Bon Jovi's album Lost Highway.
See more at Wikipedia.org...

Adjective
1. lacking companions or companionship; "he was alone when we met him"; "she is alone much of the time"; "the lone skier on the mountain"; "a lonely fisherman stood on a tuft of gravel"; "a lonely soul"; "a solitary traveler"
(synonym) alone(p), lone(a), lonely(a), solitary
(similar) unaccompanied
2. marked by dejection from being alone; "felt sad and lonely"; "the loneliest night of the week"; "lonesome when her husband is away"; "spent a lonesome hour in the bar"
(synonym) lonesome
(similar) dejected
3. separated from or unfrequented by others; remote or secluded; "a lonely crossroads"; "a solitary retreat"; "a trail leading to an unfrequented lake"
(synonym) lonely(a), solitary, unfrequented
(similar) inaccessible, unaccessible
4. enjoyed or performed alone; "a lonely existence"; "his lonely room"; "took a solitary walk"; "enjoyed her solitary dinner"; "solitary pursuits such as reading"
(synonym) lonely(a), solitary
(similar) unsocial

(superl.)
Sequestered from company or neighbors; solitary; retired; as, a lonely situation; a lonely cell.
  

(superl.)
Not frequented by human beings; as, a lonely wood.
  

(superl.)
Having a feeling of depression or sadness resulting from the consciousness of being alone; lonesome.
  

(superl.)
Alone, or in want of company; forsaken.
  

gu1 zhang3 nan2 ming2
It's difficult to clap with only one hand.
It's hard to succeed without support.

pang2 ruo4 wu2 ren2
As if there was nobody around.
Acting as if there was nobody present in the vicinity. Self-assured or supercilious.