Sen gülünce ben de gülmeden edemiyorum.

Gülünce comes from the verb gülmek, which can mean to laugh or to smile, depending on context.

It is made of:

• gül- = the verb stem
• -ünce = a suffix meaning when, once, or whenever

So gülünce means when you laugh/smile or whenever you laugh/smile.

In this sentence, it is understood as when you do that, and the subject is sen, so the full idea is when you smile/laugh.

In Turkish, pronouns are often omitted if the meaning is already clear. So you could say:

• Gülünce ben de gülmeden edemiyorum.

and it would still make sense.

But sen is included here for emphasis or contrast. It makes the sentence feel more personal:

• Sen gülünce... = When you smile/laugh...

It highlights you specifically.

Ben de means I too, me too, or I also.

The particle de adds the idea of also / too.

So:

• sen gülünce = when you smile/laugh
• ben de = I too
• gülmeden edemiyorum = can’t help smiling/laughing

Together, ben de shows that your action causes the same action in me.

Literally, it breaks down like this:

• gülmeden = without laughing/smiling
• edemiyorum = I cannot do

So the literal sense is something like:

I cannot do without laughing/smiling

But this is not how we would normally say it in English. The natural meaning is:

• I can’t help laughing
• I can’t help smiling

This is a very common Turkish pattern.

This is because Turkish has a fixed structure:

• -meden / -madan edememek

This expression means:

• to be unable to refrain from doing
• to be unable not to do something
• to can’t help doing something

So:

• gülmeden edememek = to be unable to keep from laughing/smiling

Even though -meden literally means without doing, the whole expression is idiomatic. You should learn it as a chunk:

• X-meden edememek = can’t help X-ing

Edemiyorum comes from etmek, which means to do.

Its parts are:

• et- = do
• -e/me = ability / possibility pattern in the negative
• -iyor = present continuous
• -um = I

Because of sound changes, etmek becomes edemiyorum here, not etemiyorum.

So:

• edemiyorum = I cannot do / I’m unable to do

Inside the expression gülmeden edemiyorum, it means I can’t help it; I end up laughing/smiling.

Because the speaker is not just saying I laugh too. The sentence gives a stronger idea:

• not simply I laugh
• but I cannot stop myself from laughing

Compare:

• Ben de gülüyorum = I’m laughing too
• Ben de gülmeden edemiyorum = I can’t help laughing too

The second version emphasizes that the reaction is automatic or irresistible.

It can mean either, depending on context.

In English, laugh and smile are separate verbs, but Turkish gülmek covers both ideas in many situations.

So this sentence could be understood as:

• When you laugh, I can’t help laughing too
• When you smile, I can’t help smiling too

If the meaning has already been given to the learner, that context will tell you which is better here.

This suffix creates a kind of time clause. It often means:

• when
• once
• whenever

Examples:

• gelince = when he/she comes
• bitince = when it finishes
• gülünce = when you laugh/smile

Which form appears depends on vowel harmony:

• -ince
• -ınca
• -ünce
• -unca

Because gül has the front rounded vowel ü, the correct form is -ünce.

This is due to Turkish vowel harmony.

The suffix changes to match the vowel in the stem. Since gül- contains ü, the suffix becomes -ünce.

So:

• almak → alınca
• gelmek → gelince
• bulmak → bulunca
• gülmek → gülünce

This is a normal and very important pattern in Turkish.

No. They look the same in writing, but they are different things.

Here, de is a separate word meaning:

• also
• too

So:

• ben de = me too / I also

This is not the suffix seen in words like:

• evde = at home
• masada = on the table

A useful clue is that the also/too version is written separately.

Yes, Turkish word order is flexible, although some orders sound more natural than others.

The given sentence:

• Sen gülünce ben de gülmeden edemiyorum.

is very natural.

You could also say:

• Ben de sen gülünce gülmeden edemiyorum.

This still works, but it shifts the focus a little.

Turkish often places the most important or emphasized information before the verb. Since the verb usually comes at the end, changing the order can change emphasis more than basic meaning.

Yes, the main verb edemiyorum is in the present continuous form, which in Turkish often covers what English expresses as:

• I am not able
• I can’t
• I can’t help

So the sentence can describe a general present habit or tendency, not only something happening right now.

That is why it naturally translates as something like:

• When you smile, I can’t help smiling too
• Whenever you laugh, I can’t help laughing too

That is close in general meaning, but it is weaker than the Turkish.

The Turkish specifically says:

• I can’t help laughing too
• I just can’t stop myself from laughing too

So a better translation keeps that stronger sense of automatic reaction.

Yes. The pattern -meden edememek / -madan edememek is very useful and common.

Some examples:

• Gülmeden edemiyorum. = I can’t help laughing/smiling.
• Bakmadan edemedim. = I couldn’t help looking.
• Sormadan edemeyeceğim. = I won’t be able to help asking.

It is worth learning this as a whole structure, because the literal wording can be confusing if you translate word by word.