Breakdown of Дорога идёт через лес, смотри, не споткнись о корень.
не
not
смотреть
to watch / to look at / make sure (in a warning)
идти
to go (on foot) / to proceed, go (of a process)
дорога
road, way
лес
forest, wood
через
through
споткнуться
to trip
о
against (contact)
корень
the root
Questions & Answers about Дорога идёт через лес, смотри, не споткнись о корень.
Why do we use the perfective verb споткнись here when negative commands usually take imperfective verbs?
You are right that direct negative commands usually take imperfective verbs. However, when warning someone not to do something accidentally (like tripping, falling, or forgetting), we use не plus the perfective imperative. It translates to 'be careful not to' rather than forbidding a deliberate action.
Does the word смотри play a special role in this warning?
Yes, in this context смотри (literally 'look') acts as a warning particle meaning 'watch out' or 'make sure'. It is very frequently paired with negative perfective verbs of prevention. While you could just say не споткнись, adding смотри makes the warning sound much more natural and urgent.
Why do we use the preposition о for tripping 'over' the root? Doesn't о usually mean 'about'?
You already know о plus the Prepositional case means 'about'. But when о (or об before vowels) is used with the Accusative case, it indicates physical contact, meaning 'against'. The verb споткнуться requires о plus the Accusative to express stumbling or striking your foot against an obstacle.
If о takes the Accusative case here, why does корень look like it is in the Nominative?
The word корень (root) is a masculine inanimate noun. For all inanimate masculine nouns, the Accusative case form is identical to the Nominative case form, so the ending does not change here.
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