S: (v) promise (give grounds for expectations) "The new results were promising"; "The results promised fame and glory"
Adjective
S: (adj) promising (showing possibility of achievement or excellence) "a promising young man"
S: (adj) bright, hopeful, promising (likely to turn out well in the future) "had a bright future in publishing"; "the scandal threatened an abrupt end to a promising political career"; "a hopeful new singer on Broadway"