: It is treated as a mobile clitic rather than a permanent attachment to the verb stem.
: The "format" (the addition of się ) often completely changes the verb's meaning (e.g., uczyć "to teach" vs. uczyć się "to learn"). Czasowniki polskie z formatem rozdzielonym
The most helpful feature of these verbs is that the reflexive marker is not a fixed suffix (unlike in some other Slavic languages like Russian). Instead, it is a "separated format" because: : It is treated as a mobile clitic
: While it is part of the verb's meaning, "się" can move within a sentence depending on rhythm and emphasis. Czasowniki polskie z formatem rozdzielonym