csak

In Hungarian, csak is more than just a vocabulary word; it is a structural marker.

1. Placement as 'Only':
When used to mean 'only', place csak directly before the noun, adverb, or phrase you want to limit. For example: csak ma (only today), csak két alma (only two apples).

2. The Focus Position:
The phrase starting with csak (meaning 'only') must occupy the focus position. In affirmative sentences, this is the slot immediately preceding the verb. When negating the action itself (sentence negation), the negation word nem strictly occupies the immediately pre-verbal slot, and the focus phrase must precede nem. Example: Csak a boltba nem mentem el. (I only didn't go to the shop.) For negating the csak phrase itself (constituent negation), see Point 6.

3. Verbal Prefix Inversion:
If a verb has a prefix (like el-, ki-, be-, meg-), and a csak-phrase is placed in the focus position, the prefix usually moves to the position immediately after the verb.
Example: Elmentem. (I went away.) vs. Csak a boltba mentem el. (I only went to the shop.)
However, if there is an auxiliary verb (like akar, fog, kell), the prefix stays on the infinitive because the focus blocks prefix climbing. Example: Csak a boltba akarok elmenni. (I only want to go to the shop.)

4. Verb Focus Exception:
If csak modifies the verb itself (meaning you 'only' did that action and nothing else), the prefix does not split. Example: Csak elolvastam. (I only read it.)

5. Other Functions of 'Csak':
It is important to note that csak does not always trigger these changes.
• Just / Momentarily: When csak means 'just' doing something quickly or casually, it does not trigger inversion. Example: Csak benézek a boltba. (I'm just popping into the shop.)
• Finally / At last: When csak expresses that something finally happened, it does not trigger inversion. Example: Csak megjöttél! (You finally arrived!)
• As a Conjunction: When csak means 'but' (similar to de), it does not move the verbal prefix. Example: Szeretnék elmenni, csak nincs időm. (I would like to go, but I don't have time.)
• As a Modal Particle: When used as a modal particle to mean 'just' or 'go ahead', standard imperative rules apply (the prefix is already inverted by default). Example: Csak menj el! (Just go away!)

6. Nem Csak (Not Only):
The negative counterpart nem csak (not only) also occupies the focus position and triggers the same prefix inversion. Example: Nem csak a boltba mentem el. (I didn't only go to the shop.)

7. Post-Verbal Flexibility:
Once the focus, verb, and inverted prefix are locked into place, the word order of the remaining elements in the postverbal field becomes relatively flexible.

8. Scalar Nuance:
Beyond 'only', csak often implies that something is 'just' or 'merely' a small amount, suggesting it might not be enough or is surprisingly little.