"problematic" in the adjective sense
1. debatable, problematic, problematical
open to doubt or debate
"If you ever get married, which seems to be extremely problematic"
2. baffling, elusive, knotty, problematic, problematical, tough
making great mental demands hard to comprehend or solve or believe
"a baffling problem"
"I faced the knotty problem of what to have for breakfast"
"a problematic situation at home"
Source: WordNet® (An amazing lexical database of English)
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