Breakdown of Vihollisen valtakunta tuhoutukoon!
vihollinen
enemy
valtakunta
realm
tuhoutua
to be destroyed
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Questions & Answers about Vihollisen valtakunta tuhoutukoon!
How is tuhoutukoon formed and what exactly does the -koon ending do?
The ending -koon is the third-person singular imperative suffix, also known as the jussive mood. It is added to the infinitive stem of the verb, which for tuhoutua (to be destroyed) is tuhoutu-. It expresses a command, wish, or allowance directed at a third party, translating here to "may it be destroyed" or "let it be destroyed".
Why does the sentence use tuhoutukoon instead of tuhotkoon?
This highlights an important B2-level difference between transitive and intransitive verbs. Tuhotkoon comes from the transitive verb tuhota (to destroy). If you used it here, it would mean "Let the realm destroy (something else)". Because the realm itself is the thing perishing, we must use the intransitive counterpart tuhoutua (to be destroyed).
The English translation says "Let the enemy's realm...", so why is valtakunta (realm) in the nominative case rather than an object case?
In English, "realm" acts like an object following the command "let". However, in Finnish, there is no separate verb for "let" in this sentence. Valtakunta is the grammatical subject of the verb tuhoutukoon (literally: "May the realm be destroyed"). Because it is the subject, it takes the standard nominative case.
In what kinds of situations would you actually use this -koon form?