dogmatic
US /dɑːɡˈmæt̬.ɪk/
UK /dɑːɡˈmæt̬.ɪk/
1.
inclined to lay down principles as undeniably true, without consideration of evidence or the opinions of others
:
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He was too dogmatic in his views to consider alternative solutions.
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Her teaching style was very dogmatic, leaving no room for discussion.