want·ing 
(wŏntĭng, wôn-)
(wŏntĭng, wôn-)adj.
1. Absent; lacking: What is wanting is a real understanding of the issue.
2. Not measuring up to standards or expectations: found his performance wanting.
prep.
1. Without; missing: a shirt wanting a button.
2. Minus; less: an hour wanting 15 minutes.