Sandalye masif ahşaptan yapılmış.

Masif means solid in the sense of solid wood, not hollow, veneered, or made from particle board/MDF.

So masif ahşap is a common expression meaning solid wood.

It does not mean massive in the English sense of very big, even though the words look similar.

The ending -tan means from / out of.

So:

• ahşap = wood / wooden material
• ahşaptan = from wood / made out of wood

In Turkish, the material something is made from is often marked this way:

• camdan = from glass
• plastikten = from plastic
• taştan = from stone

So masif ahşaptan yapılmış literally has the idea of made from solid wood.

This is because of consonant harmony / devoicing.

The suffix is basically -dan / -den / -tan / -ten, depending on the word before it.

Since ahşap ends in p, which is a voiceless consonant, the suffix changes to -tan rather than -dan:

• ahşap
  • -dan -> ahşaptan

This is a very common pattern in Turkish:

• kitap -> kitaptan
• ağaç -> ağaçtan
• şehir -> şehirden

Not quite.

• ahşap refers to wood as a building or furniture material
• odun usually means firewood
• tahta often means board / plank / wooden board

So in a sentence about furniture, ahşap is the natural word.

That is why masif ahşap sounds appropriate for a chair, table, cabinet, and so on.

Yapılmış comes from the verb yapmak (to make / to do).

It contains:

• yap- = the verb stem
• -ıl- = passive marker, giving the idea be made
• -mış = a past/resultative/evidential form

So yapılmış means something like:

• has been made
• was apparently made
• is made (with focus on the resulting state)

In this sentence, it describes the chair as something made from solid wood.

It can overlap with all of those in English depending on context.

In this sentence, the most natural sense is often the resulting state:

• The chair is made of solid wood

But the Turkish form still literally carries a completed-action flavor, something like:

• The chair has been made from solid wood

Turkish -mış often points to a result, background information, or something the speaker presents as learned/observed rather than directly witnessed as an event.

Yapıldı and yapılmış are related, but they do not feel exactly the same.

• yapıldı = was made; a straightforward past event
• yapılmış = has been made / is apparently made / is in a made state

For product descriptions or statements about what something is made of, yapılmış often sounds more natural because it describes the object's current nature or resulting state, not just a past event.

Compare:

• Sandalye masif ahşaptan yapıldı.
  This sounds more like reporting the event of manufacture.

• Sandalye masif ahşaptan yapılmış.
  This sounds more like describing the chair as an object.

It is doing something in between, which is very common in Turkish.

Forms like yapılmış can function as participles or predicate-like descriptions. In this sentence, it works as the main predicate describing the chair.

So it behaves a bit like English:

• The chair is made of solid wood

where made is verbal in origin but descriptive in function.

Turkish usually puts the most important verbal/predicate element at the end, so yapılmış naturally comes last.

A rough structure is:

• Sandalye = the chair
• masif ahşaptan = from solid wood
• yapılmış = is made / has been made

So the sentence builds toward the final predicate.

This is normal Turkish word order. English organizes the same idea differently.

By itself, sandalye does not show the or a the way English does, because Turkish has no articles like the and a.

Its interpretation depends on context.

So this could mean:

• The chair is made of solid wood
• A chair is made of solid wood
• Chairs are made of solid wood in some generic contexts

In real usage, context usually makes the meaning clear. If the speaker wants to be more specific, they might say:

• Bu sandalye masif ahşaptan yapılmış. = This chair is made of solid wood.

Not if you want to mean the full idea The chair is made of solid wood.

Masif ahşap by itself is just a noun phrase meaning solid wood. It does not express the idea of being made from something.

You need something like:

• masif ahşaptan yapılmış
• or in some contexts masif ahşap bir sandalye

These are different:

• masif ahşap bir sandalye = a solid-wood chair
• Sandalye masif ahşaptan yapılmış = The chair is made of solid wood

They are similar in meaning, but not identical in structure or emphasis.

• masif ahşap bir sandalye = a solid-wood chair
  This is a noun phrase. It directly classifies the chair.

• Sandalye masif ahşaptan yapılmış = The chair is made of solid wood
  This is a full sentence. It describes the material the chair was made from.

So the first one names a type of chair; the second one makes a statement about the chair.

Usually, no, not in this kind of sentence.

• ağaç = tree
• ahşap = wood as a material

So masif ağaçtan yapılmış would sound odd or unnatural in most contexts, because furniture is made from wood, not directly from tree in standard phrasing.

For furniture and construction, ahşap is the better word.

Yes. It is very natural, especially in product descriptions, advertisements, catalogs, and everyday description of objects.

Similar examples:

• Masa ceviz ağacından yapılmış. = The table is made from walnut wood.
• Dolap meşeden yapılmış. = The cabinet is made from oak.
• Şişe camdan yapılmış. = The bottle is made of glass.

So [material] + -dan/-den + yapılmış is a very useful pattern to learn.