Learn Turkish: Kasisten önce mutlaka yavaşla. - Be sure to slow down before the speed bump.

To say "before [a noun]" or "after [a noun]" in Turkish, the noun must take the ablative (the "from") case. You can think of it literally as "prior from the speed bump." Because kasis (speed bump) ends in a voiceless consonant (s), the suffix must start with t. And due to vowel harmony with the i, it becomes -ten instead of -dan or -den.

We usually use önce for time. Is it normal to use it for a physical object like a speed bump?

Yes! While önce (before) and sonra (after) are frequently used for time, they are also perfectly normal to use for a physical sequence along a route. When you are driving or giving directions, saying kasisten önce (before the speed bump) is the standard way to express that something happens just before reaching a location.

What role does mutlaka play in this sentence?

Mutlaka means "absolutely," "definitely," or "without fail." When paired with a command like it is here, it translates naturally to "be sure to" or "make sure you." It turns a simple instruction into a strong warning or necessity.

How is the verb yavaşla formed from the word for "slow"?