-ni

How it works: Attach -ni directly to the end of an inanimate common noun without changing its final vowel (e.g., soko → sokoni). Note that while many loanwords perfectly accept the suffix (like benkini or hotelini), a few words like sinema often act as exceptions and prefer prepositions instead.

Stress Shift: Adding -ni adds a syllable, which shifts the spoken stress to the new penultimate (second-to-last) syllable (e.g., NYU-mba becomes nyu-MBA-ni).

Direction is determined by the verb: The suffix itself is directionally neutral. If you use a verb like enda (go), it means "to." If you use toka (leave), it means "from."

Strict Restrictions: You cannot add -ni to proper nouns (like names of cities or countries) or animate nouns (people and animals). Proper place names usually stand alone without a preposition (e.g., Ninaenda Tanzania), though they can take katika when emphasizing being "within" the borders. Animate nouns typically use kwa for "to/at/from a person," but can also take compound prepositions like ndani ya (inside) or juu ya (on top of). Furthermore, inherent locatives like mahali (place) and spatial words (such as ndani, nje, juu, and chini) can never take the -ni suffix, though mbele is a notable exception, forming mbeleni ("in the future" or "up ahead").

Agreement Changes: Because -ni changes the noun's class, any adjectives, possessives, demonstratives (e.g., hapa/huku/humu), and verbs (e.g., pamejaa) in the sentence must use locative agreement. There are three types triggered by -ni: pa- for a specific location (e.g., pangu), ku- for a general area or direction (e.g., kwangu), and mu- for inside a location (e.g., mwangu). When linking a locative noun to a person, you must use a locative associative marker. While kwa is the most common for general locations (e.g., nyumbani kwa Juma), pa or mwa are also used depending on the specific spatial reality (e.g., moyoni mwa Juma). Note that mahali (place) is the only noun inherently belonging to these locative classes. When a noun is modified by an adjective, keeping the -ni suffix requires locative agreement on the adjective (e.g., nyumbani pakubwa), which can sound clunky or overly specific. Because of this, speakers frequently drop the -ni suffix and use prepositions like katika or kwenye instead, allowing the noun to keep its original class agreement.

Watch Out for the Plural -ni: Beginners frequently confuse the locative -ni with the plural marker -ni attached to verbs and greetings. For example, asanteni means "thank you to multiple people," not "at the thank you," and karibuni means "welcome, all of you."