say it: FRUH-stray-ting
frustrating is an adjective meaning "discouraging by hindering". It carries 2 recorded senses.
discouraging by hindering
preventing realization or attainment of a desire
Definitions, synonyms and semantic relations for frustrating come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.