[2] Typical of Masovian dialects, devoicing of word-final consonants before vowels and liquids is present here.
[2] The shift of initial ja-, ra- > je-, re- is present but limited to particular words: jek (jak), remię (ramię).
Medial nasal vowels can decompose before sibilants as well, but there is also a common tendency for them to denasalize and have -j-, -ł- inserted: gołski (gąski), niescejście (nieszczęście).
[2] Initial i- often has a prothetic j-, and sometimes lowers to e: jinna (inna), jenacy (inaczej).
The groups św’-, ćw’-, dźw’- tend to harden: śfynie (świnie).
The groups chw, chrz shift to kw, krz: kwali (chwali), krzan (chrzan).
The masculine dative singular can be formed with standard -owi and -u, which are most common, but also -oju (via contamination of -owi and -u), which occurs more often in the Siedlce Voivodeship, and sometimes -ewi near Łowicz, which can be used regardless of the softness of the final stem consonant.
Masculine and neuter nouns ending in sz, ż sometimes take -e instead of -u in the locative singular: o kosie (o koszu).
Neuter nouns ending in -ę sometimes also change declination and lose -en-: o imiu (o imieniu).
[2] The comparative of adverbs and the feminine genitive/locative singular of adjectives, pronouns, and numerals can be -yj/-ij or -y/-i due to sound changes.
Adjectives, pronouns, and numerals take -em, -ém in the masculine instrumental/locative singular instead of standard -ym/-im: na tem jednem (na tym jednym), and the plural is -emy, -émy instead of -ymi/-imi: przede wszystkiem (przede wszystkim), ze wszystkiemi (ze wszystkimi).
Final -ł after consonants in the past tense of verbs tends to disappear, including before clitics: potłukem (potłukłem).
Nouns denoting young animals and people are formed with -ak, but -ę (and its diminutive -ątko) can be seen in the south.
-al may be attached to create a noun that has characteristic traits of something, often pejorative in connation: głowal (person with a big head).