La franĝo kaŝas la bukon.

The -n ending marks the direct object in Esperanto: the thing directly affected by the action.

• la franĝo = the fringe/tassel → the subject (the thing doing the action)
• la bukon = the loop/buckle → the object (the thing being hidden)

So in La franĝo kaŝas la bukon, the fringe is doing the hiding, and the loop/buckle is what gets hidden.

In Esperanto, -as marks the present tense.

So:

• kaŝi = to hide
• kaŝas = hides / is hiding

Esperanto verbs always have very regular endings:

• -as = present
• -is = past
• -os = future
• -us = conditional
• -u = command / wish

So kaŝas is the present-tense form of kaŝi.

Because -o is the normal noun ending in Esperanto.

So:

• franĝo is a noun
• buko is a noun

This is one of the most useful patterns in Esperanto:

• -o = noun
• -a = adjective
• -e = adverb
• -i = infinitive verb

That means you can often tell a word’s job just by looking at its ending.

Because both nouns are definite: the fringe and the loop/buckle.

Esperanto uses la as its definite article, just like English the. It does not change for:

• singular/plural
• subject/object
• gender

So:

• la franĝo
• la bukon

Even though bukon has the object ending -n, the article stays la.

No. Esperanto has no indefinite article.

So English a fringe or a buckle would usually just be:

• franĝo
• buko

Only the is marked, with la.

That means Esperanto often leaves indefiniteness unmarked, while definiteness is marked with la.

Because Esperanto usually does not need helper words like English does.

In English, we might say:

• The fringe hides the buckle
• The fringe is hiding the buckle
• The fringe does hide the buckle

Esperanto normally just uses the main verb form:

• kaŝas

That already tells you the action is in the present tense. Esperanto does not need does for ordinary statements.

These are regular Esperanto letters with fixed sounds:

• ĝ sounds like the g in gem or j in jam
• ŝ sounds like sh in shoe

So roughly:

• franĝo ≈ FRAHN-jo
• kaŝas ≈ KAH-shahs

Also, Esperanto stress is usually on the second-to-last syllable:

• FRAN-ĝo
• KA-ŝas
• BU-kon

Yes, more easily than in English, because the -n ending shows the object.

The normal order is:

• La franĝo kaŝas la bukon.

But Esperanto can sometimes change the order for emphasis, for example:

• La bukon kaŝas la franĝo.

That still means The fringe hides the buckle, because bukon still has the object marker -n.

Even so, the basic subject–verb–object order is the most common and natural for learners.

No, not in this sentence as written.

Because bukon has the accusative ending -n, it is marked as the object, not the subject.

If you wanted the buckle to be the subject, you would remove the -n:

• La buko kaŝas la franĝon.

That would reverse who is doing the action.

The dictionary form is kaŝi, which is the infinitive meaning to hide.

In Esperanto, verbs are usually listed in the -i form:

• kaŝi = to hide

Then you change the ending depending on tense or mood:

• kaŝas = hides / is hiding
• kaŝis = hid
• kaŝos = will hide

So when learning vocabulary, it helps to recognize that kaŝas comes from kaŝi.

It is singular.

In Esperanto:

• -o = singular noun
• -oj = plural noun
• -on = singular direct object
• -ojn = plural direct object

So:

• buko = a/the buckle, loop
• bukon = a/the buckle, loop as the direct object
• bukoj = buckles / loops
• bukojn = buckles / loops as the direct object

Here, bukon means one object is being hidden.