La instruistino laŭdis ŝin pro la klara respondo.

The ending -ino is the standard Esperanto suffix for female.
So:

• instruisto = teacher
• instruistino = female teacher

A native English speaker may notice that English usually just says teacher, without marking gender. Esperanto can do that too in some contexts, but -ino explicitly tells you the teacher is female.

La is the Esperanto definite article, meaning the.

In this sentence it appears in:

• La instruistino = the teacher
• la klara respondo = the clear answer

Esperanto uses la much like English uses the. It does not change for gender, number, or case.

Also, Esperanto has no indefinite article. So:

• instruistino can mean a teacher
• la instruistino means the teacher

The ending -is marks the past tense in Esperanto.

So:

• laŭdi = to praise
• laŭdas = praises / is praising
• laŭdis = praised
• laŭdos = will praise

The verb form is very regular. It does not change depending on the subject. So whether the subject is I, you, she, or they, the past tense still ends in -is.

Because ŝin is the direct object form of the pronoun.

In Esperanto:

• ŝi = she
• ŝin = her

The ending -n marks the direct object. In this sentence, the teacher is doing the praising, and her is receiving that action, so Esperanto uses ŝin.

This is one of the most important features of Esperanto grammar:

• subject form: ŝi
• object form: ŝin

English mostly shows this only in pronouns, like she/her, he/him, they/them.

Yes. It is the same basic accusative marker.

In Esperanto, -n often marks the direct object:

• Mi vidas la hundon. = I see the dog.
• La instruistino laŭdis ŝin. = The teacher praised her.

Pronouns use it too:

• li → lin
• ŝi → ŝin
• ili → ilin

So ŝin is not a separate random word; it is ŝi with the object ending.

Here pro means because of, on account of, or for in the sense of as a reason.

So ŝin pro la klara respondo means that she was praised because of the clear answer.

This can be tricky for English speakers because English for has many meanings. Esperanto often separates them more clearly:

• pro = because of
• por = for, in order to, intended for

So here pro is correct because it gives the reason for the praise.

Because the phrase is governed by the preposition pro.

After most prepositions in Esperanto, nouns do not take the accusative -n. So:

• pro la klara respondo = because of the clear answer

Since respondo does not have -n, the adjective also does not have -n:

• klara respondo

Adjectives agree with the nouns they describe in number and case. So if the noun had -n, the adjective would too. But here neither one does.

The ending -a shows that klara is an adjective.

In Esperanto:

• klar- = the idea of being clear
• klara = clear
• klare = clearly
• klareco = clarity

So la klara respondo means the clear answer.

This is part of Esperanto’s very regular word-building system:
-a for adjectives, -o for nouns, -e for adverbs, and so on.

Because the sentence refers to one answer.

In Esperanto:

• respondo = answer
• respondoj = answers

The plural ending is -j. Since there is no -j here, it is singular.

Likewise, if the adjective were plural too, it would also take -j:

• la klaraj respondoj = the clear answers

The letter ŭ is a short w-like sound. In laŭdis, the aŭ is pronounced roughly like the ow in now.

So laŭdis sounds approximately like LOW-dis.

A few useful pronunciation points here:

• ŝ sounds like English sh
• ŭ is a short glide, not a full vowel by itself
• stress in Esperanto is always on the second-to-last syllable

So:

• instruistino → in-stru-is-TI-no
• laŭdis → LAŬ-dis
• respondo → res-PON-do

Yes, Esperanto word order is fairly flexible, mainly because endings show the grammar clearly.

For example, ŝin has -n, so you can tell it is the object even if it moves around. The most neutral order here is:

• La instruistino laŭdis ŝin pro la klara respondo.

But other orders can be possible for emphasis, such as putting ŝin earlier. Still, learners should usually start with the normal subject–verb–object order unless there is a special reason to change it.

Yes. The suffix -ino specifically marks female.

So if you say instruistino, you are clearly saying the teacher is female.

A learner should also know:

• instruisto is the basic form
• instruistino is the explicitly female form

In traditional Esperanto usage, instruisto can sometimes be used generically, but instruistino is definitely female.

Because Esperanto verbs do not agree with the subject in person or number.

So:

• mi laŭdis = I praised
• vi laŭdis = you praised
• ŝi laŭdis = she praised
• ili laŭdis = they praised

The ending -is always means past tense, no matter who did the action. This is much simpler than English, where forms like am/is/are or praise/praises change.