How about yearning.
Student or Learner
I'm looking for a commen averb or an expression to show somebody's sadness about somthing he would like to have but he has never had it befor, like a baby for a infertile woman.
As I know regret is not appropriate.
Wistful- (adverb wistfully) you could use that in situations which were not so important, such as wishing the rain would stop and you could enjoy a sunny holiday.
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