Megmérjük a fékhatást.

Meg- is a very common verbal prefix in Hungarian. Here it gives the verb a more completed, result-focused sense.

• mérjük = we measure it / we are measuring it
• megmérjük = we measure it fully / we’ll measure it / we check it by measuring

In technical or procedural language, meg- often sounds very natural because it suggests that the action is carried through to its result.

So yes, you can sometimes see mérjük without meg-, but megmérjük sounds more like a complete, concrete action.

Because Hungarian is using the definite conjugation here.

The direct object is a fékhatást, which is a definite object: the braking effect / the braking performance. When the object is definite, Hungarian usually uses a special set of verb endings.

Compare:

• mérünk valamit = we measure something
• mérjük a fékhatást = we measure the braking effect

So -jük tells you both:

• the subject is we
• the verb has a definite object

With the prefix added, that becomes megmérjük.

Because Hungarian usually drops subject pronouns when they are already clear from the verb ending.

In megmérjük, the ending already tells you the subject is we. So adding mi is usually unnecessary.

• Megmérjük a fékhatást. = normal, neutral
• Mi megmérjük a fékhatást. = more emphatic, something like we will measure the braking effect

This is very normal in Hungarian. Subject pronouns are often only used for emphasis, contrast, or clarity.

Formally, it is present tense.

But in Hungarian, the present tense is very often used for near future or planned next-step meaning, especially in instructions, demonstrations, and technical contexts.

So depending on context, Megmérjük a fékhatást can mean:

• We are measuring the braking effect
• We will measure the braking effect

Both are possible. The situation usually makes it clear.

Because -t is the usual accusative ending in Hungarian, and the accusative marks the direct object of the verb.

Here, the thing being measured is fékhatás, so it takes the accusative:

• fékhatás = braking effect
• fékhatást = braking effect, as the direct object

So the -t is there because this is the thing that the action is being done to.

It is a compound noun, which is very common in Hungarian.

• fék = brake
• hatás = effect

So fékhatás literally means brake effect.

In real usage, it refers to something like braking effect, braking performance, or how effective the brakes are, depending on context.

Hungarian has two forms of the definite article:

• a before a consonant
• az before a vowel

Since fékhatást begins with f, which is a consonant, the correct form is a:

• a fékhatást

If the next word began with a vowel, you would use az instead.

Hungarian word order is much more flexible than English word order. It depends a lot on topic, focus, and what the speaker wants to emphasize.

A verb-first sentence like Megmérjük a fékhatást is very natural in a neutral, matter-of-fact, procedural context. It can sound like:

• the next step in a process
• an instruction
• a simple statement of what is being done

Because the verb ending already shows we, there is no need to begin with a separate subject.

In this sentence, yes.

The prefix meg- is attached directly to the verb in a normal, neutral affirmative statement:

• Megmérjük a fékhatást.

But Hungarian verbal prefixes can separate in some sentence patterns, especially with negation or strong focus.

For example:

• Nem mérjük meg a fékhatást. = We do not measure the braking effect.
• A fékhatást mérjük meg. = It is the braking effect that we measure / We measure the braking effect specifically.

So here it is one word because the sentence is a straightforward neutral statement.