pillow
The word 'oreiller' is a common noun in French, used to refer to what you lay your head on when you sleep, similarly to 'pillow' in English. For example, you would say 'Je dors sur mon oreiller', which translates to 'I sleep on my pillow'.
I need to buy a new pillow.
This sentence is about someone expressing a need to buy a new pillow. In French, 'Je dois' translates to 'I need to', 'acheter' means 'buy', 'un nouvel' means 'a new' and 'oreiller' is 'pillow'. This sentence is in the present tense.
My pillow is very comfortable.
In this case, the speaker refers to the comfort of their own pillow. The French word 'Mon' is a possessive adjective that means 'my'. 'Est' is the third person singular of the verb 'être' (to be). 'Très' means very and 'confortable' means comfortable.
Is your pillow soft or hard?
This example is a yes/no question asking someone about the texture of their pillow. 'Votre' translates to 'your', 'est-il' to 'is it', 'doux' to 'soft', 'ou' to 'or', and 'dur' to 'hard'. In French, the question mark does not affect the word order unlike in English.