of go
not present, no longer in existence
Cases of word usage
1) to be still present after a part has gone or has been away; to continue in the same place or condition (remain)
2) having gone bad; very unpleasant, ill, bad etc (rotten)
3) having a sharp taste (like that of vinegar, a lemon or an unripe apple etc); having a taste of having gone bad; bad-tempered (sour)