Это старый железный ключ.

Breakdown of Это старый железный ключ.

это
this / it is
старый
old
ключ
key
железный
iron, made of iron

Questions & Answers about Это старый железный ключ.

Why does the sentence start with Это instead of Этот, since ключ is masculine?
When you are stating "This is a..." or "That is a...", Russian always uses the fixed neuter pronoun Это, regardless of the noun's gender. If you used Этот, it would attach directly to the noun, making an incomplete phrase: Этот старый железный ключ... means "This old iron key..." rather than a full sentence.
In English, "iron" can be a noun. Why does Russian use the adjective железный here?
English frequently stacks nouns together to describe things (like "iron key" or "paper cup"). Russian rarely does this. Instead, you must use a relational adjective formed from the material. Here, the noun железо (iron) becomes the adjective железный (made of iron).
Is there a specific rule for the word order of the adjectives старый железный?
Yes, similar to English, Russian follows a natural adjective order. General descriptions and qualities like age (старый) or size usually come before highly specific, objective categories like material (железный) or nationality.
Why is there no soft sign (ь) at the end of ключ, since ч is a soft sound?
For Russian nouns ending in "husher" consonants (ж, ш, ч, щ), a soft sign is only added at the end if the noun is feminine (like ночь or мышь). Because ключ is masculine, it never takes a soft sign at the end, even though the ч sound is always soft.

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