abstruse /əbˈstruːs/

a

I. adjective

difficult to understand; obscure

an abstruse philosophical inquiry.
II. derivatives

1. abstrusely /əbˈstruːsli /
adverb


2. abstruseness /əbˈstruːsnəs /
noun


– origin late 16th cent.: from Latin abstrusus ‘put away, hidden’, from abstrudere ‘conceal’, from ab- ‘from’ + trudere ‘to push’.

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