discouraging

US /dɪˈskɝː.ɪ.dʒɪŋ/
UK /dɪˈskɝː.ɪ.dʒɪŋ/
1.

making you feel less confident, enthusiastic, and positive about something, or less willing to do something:

:
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Despite the discouraging results, astronomers were not worried.
:
discourage