say it: TRUHB-uh-ling
troubling is an adjective meaning "causing distress or worry or anxiety". It carries one recorded sense.
causing distress or worry or anxiety
“distressing (or disturbing) news”
“lived in heroic if something distressful isolation”
“a disturbing amount of crime”
“a revelation that was most perturbing”
“a new and troubling thought”
“in a particularly worrisome predicament”
“a worrying situation”
“a worrying time”
Definitions, synonyms and semantic relations for troubling 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.