frustrating

n.	1.	an act of hindering someone's plans or efforts.
adj.	1.	preventing realization or attainment of a desire; causing frustration.
	2.	discouraging. Opposite of encouraging.

Adj.	1.	frustrating - discouraging by hindering
	2.	frustrating - preventing realization or attainment of a desire Synonyms: frustrative, thwarting

frustrative, preventative, preventive, thwarting