ش ر حsh-r-ḥ
(ف) شَرَحَ يَشْرَحُ شَرْحًاsharaḥa yashraḥu sharḥan: (1) to cut meat into long strips and spread it out; hence in a general sense it is used for giving breadth, making wide. ﴿اَلَمْ نَشْرَحْ لَكَ صَدْرَكَ﴾ (Ash-Sharḥ 94:1); ﴿وَلٰكِنْ مَّنْ شَرَحَ بِالْكُفْرِ صَدْرًا﴾ (An-Naḥl 16:106) (2) to lay open the deeper meanings of a matter or problem; hence in a general sense it is used for expounding.
اِشْرَحْishraḥ (imperative verb, amr): expand, lay open. ﴿رَبِّ اشْرَحْ لِيْ صَدْرِيْ﴾ (Ṭā Hā 20:25)
Form II (tafʿīl) شَرَّحَ يُشَرِّحُ تَشْرِيْحًاsharraḥa yusharriḥu tashrīḥan: to cut meat into pieces; to dissect a body to examine its organs (this verb is not used in the Quran).