This is the 6623rd most frequent Arabic word.
البطن
"The abdomen" or "the belly."
The word "البطن" (al-batn) is used here as part of the structure "بطن" meaning stomach, referring to the physical organ where the sensation originates.
أشعر بألم في بطني.
I feel pain in my stomach.
Here, "بطن" (batn) metaphorically describes the central or innermost part of a geographical location.
الجبال تقع في بطن الوادي.
The mountains are located in the heart of the valley.
In this context, "بطن" (batn) is used figuratively to mean the essence or core, illustrating its abstract application.