Think of honour as something other people hand you and keep handing you: they respect your name, and they take your word as good. Dis- takes it back. So you can picture dishonour as that thing being returned or torn up. Which half is being torn up decides the sense. If it is the respect, a family or a uniform loses its good name. If it is your word, then a deal you made, or a that promised money, is simply not honoured. The two halves are the same idea seen from outside and from inside: what people think of you, and whether what you said can be relied on.
From the word’s history
Wiktionary gives the word as from Old French deshonor, equivalent to dis- plus honour. The two parts are still visible in modern use, which is why both branches of the word can be read straight off honour.
來源記載：dishonour 出自古法語 deshonor，等於 dis- 加 honour。這兩個部件到今天還看得出來，所以這個字的兩條分支，都可以直接從 honour 反過來讀。
Wiktionary (kaikki extract in this packet), dishonour etymology_text, source_ref kaikki:3f6f69a190036ae4:1059123535
登入就可以看每一支怎麼連回核心畫面。