คำว่า ' problem ' ( ADJ )
มีความหมายในภาษาไทยว่า ที่ยากจะแก้ไข
คำนิยามในภาษาอังกฤษ (definition) :
[n.] A question proposed for solution; a matter stated for examination or proof; hence, a matter difficult of solution or settlement; a doubtful case; a question involving doubt.
[n.] Anything which is required to be done; as, in geometry, to bisect a line, to draw a perpendicular; or, in algebra, to find an unknown quantity.