TSUMUGU · TOCFL 7 (est.) · 詞
攻關
ㄍㄨㄥ ㄍㄨㄢ · gōngguān
verb — to storm a pass; (figurative) to tackle a hard problem, to crack a key difficulty
字源 FORM — what the parts do
攻to attack, to assault (進攻)gōng
關a pass, a strategic gate (關口)guān
攻關，進攻的攻，關口的關。
故事 STORY — a scene to remember it by
兵打向那道橫木閂住的關（門）——攻下它，路就通了。
Soldiers drive at the barred gate of the pass (門) — take it, and the road opens.
記憶法
關 · Related
進jìngōngto advance and attack — the same 口guānkǒuthe pass itself, the choke-point — the same