強制
きょうせい · kyousei · JLPT N1 · noun
duty
強 strong + 制 control = strong control, so compulsion or obligation
強 means strong and 制 means control or system. Put together, they describe control that is forced on you, which gives the meanings obligation, compulsion, and enforcement.
制 — knife 刂 + 未 (tree branches)
Originally depicted a knife 刂 cutting branches from a tree, showing the act of trimming or shaping wood. From this concrete sense of cutting to size came the meanings 'to make,' 'to manufacture,' and by extension 'to control' or 'regulate' — shaping things to a desired form.