Impressio quadrantis parva est.

The subject is impressio.

You can tell because:

• it is in the nominative singular
• the verb est is singular
• parva also matches impressio in gender, number, and case

So the basic structure is:

• impressio = subject
• parva = predicate adjective describing the subject
• est = is

Quadrantis is genitive singular, and the genitive often shows possession or relationship. In this sentence, it means something like of the quarter or of the quadrant, depending on the meaning already given to the learner.

So impressio quadrantis means the impression of the quarter/quadrant.

This is a very common Latin pattern:

• nomen puellae = the name of the girl
• porta urbis = the gate of the city
• impressio quadrantis = the impression of the quarter/quadrant

Impressio is a third-declension feminine noun.

Its dictionary form would normally be something like:

• impressio, impressionis f.

That tells you:

• impressio = nominative singular
• impressionis = genitive singular
• f. = feminine

In this sentence, impressio is nominative singular because it is the subject.

Quadrantis comes from the noun quadrans, which is also a third-declension noun.

Its dictionary form would be:

• quadrans, quadrantis m.

Here:

• quadrans = nominative singular
• quadrantis = genitive singular

So the sentence uses the genitive singular form quadrantis to mean of the quarter/quadrant.

This is a normal third-declension pattern: many third-declension nouns have different stems in the nominative and the other cases.

Because parva agrees with impressio.

Latin adjectives must agree with the nouns they describe in:

• gender
• number
• case

Since impressio is:

• feminine
• singular
• nominative

the adjective must also be:

• feminine
• singular
• nominative

So we get parva.

Compare:

• parvus = masculine singular nominative
• parva = feminine singular nominative
• parvum = neuter singular nominative/accusative

Yes. Parva est means is small.

The sentence is using a linking verb:

• impressio = the subject
• est = is
• parva = adjective describing the subject

So Latin is doing the same basic thing as English in a sentence like The impression is small.

This kind of pattern is very common:

• puella laeta est = the girl is happy
• urbs magna est = the city is big
• impressio quadrantis parva est = the impression of the quarter/quadrant is small

Latin word order is much more flexible than English word order because Latin uses case endings to show grammatical function.

In English, word order does a lot of the work. In Latin, endings do much of that work instead.

So although this sentence is written as:

• Impressio quadrantis parva est

Latin could also rearrange it in other ways without changing the basic meaning, for example:

• Parva est impressio quadrantis
• Impressio parva est quadrantis
  though this may be less natural depending on context
• Quadrantis impressio parva est

The exact order can affect emphasis or style, but the endings still tell you what each word is doing.

Classical Latin does not have definite and indefinite articles like English the and a/an.

So impressio can mean:

• an impression
• the impression

You figure out which one is meant from the context.

That is completely normal in Latin. For example:

• puella venit can mean the girl comes or a girl comes
• urbs magna est can mean the city is big or a city is big

Because parva is feminine nominative singular, while quadrantis is genitive singular.

They do not match in case, and probably not in gender either. So parva cannot be describing quadrantis here.

Instead, parva matches impressio:

• impressio = nominative singular feminine
• parva = nominative singular feminine

That agreement shows that parva describes impressio, not quadrantis.

Sometimes Latin can omit est, especially in certain styles or contexts, but with a simple learner sentence like this, keeping est is normal and helpful.

So:

• Impressio quadrantis parva est = full, clear sentence
• Impressio quadrantis parva could sometimes be understood, but it is less explicit

For beginners, it is best to read this as a standard subject + predicate adjective + form of esse pattern.

A simple parsing would be:

• Impressio — noun, nominative singular feminine, third declension; subject
• quadrantis — noun, genitive singular masculine, third declension; depends on impressio
• parva — adjective, nominative singular feminine; agrees with impressio
• est — verb, 3rd person singular present active indicative of esse

So the grammar is:

• subject: impressio
• dependent genitive: quadrantis
• predicate adjective: parva
• verb: est