分担
ぶんたん · buntan · JLPT N1 · noun
allotment
分 — knife 刀 + eight 八 (split apart)
分 originally depicted a knife (刀) cutting something into two parts, shown by 八 above (which itself meant 'divide'). The core sense is 'to divide' or 'split', from which extended meanings like 'portion', 'minute', and 'part' developed. Pronounced fèn, it carries the sense of an allotted share.
担 — hand radical 扌 + 詹 (zhān, phonetic)
担 is a semantic-phonetic compound: 扌 (hand) gives the meaning of carrying or shouldering, while 詹 supplies the sound. Originally written 擔, it depicted bearing a load on a shoulder pole; 担 is the simplified form. Meanings extended from physical carrying to bearing responsibility.