One picture carries the whole word: the ground itself has split open. The sides fall away , the bottom is out of sight, and the two edges stay exactly where they are. You cannot step over a chasm. You either build something across it, or you stand on your own side and look at whoever is on the other.

可以想成大地自己裂開了一道口。兩側是陡直的壁,底部深到看不見。重點不在它有多寬,而在於跨不過去。你只能在上面架橋,或是站在這一頭,看著另一頭的人。這個畫面一路帶到抽象的用法:兩群人之間的差距大到像地裂開,中間沒有路可以走過去。所以英文談 chasm 時,動詞常常是 cross(越過)、bridge(架橋)、widen(越裂越開),而不是「填平」。

From the word’s history

English took the word from Latin chasma, itself from Ancient Greek khásma, meaning a gaping opening or abyss — a word built on the idea of a mouth opening wide. That open mouth is still the picture underneath both modern uses.

這個字來自拉丁文 chasma,再往前是古希臘文 χάσμα,意思是「張開的大口、深淵」。那個「張口」的畫面,就是今天 chasm 的底:地張開了嘴,或是兩邊之間張開了一個補不起來的口。

Wiktionary entry 'chasm' (packet source_ref kaikki:3f6f69a190036ae4:918538617)

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