Entries on سمقر in 2 Arabic dictionaries by the authors Murtaḍa al-Zabīdī, Tāj al-ʿArūs fī Jawāhir al-Qamūs and Habib Anthony Salmone, An Advanced Learner's Arabic-English Dictionary
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سمقر
سَمْقَرَ — إِسْمَقَرَّ
a. Was hot, sultry (day).