words - 入り and 付き in these sentences

I saw some sentences like this, but I couldn't understand them. What do they mean?

砂糖入りのお茶。

胡椒付きのサラダ。

Answer

1. 砂糖[入り]{いり}のお茶 = 砂糖が入っているお茶


2. 胡椒付きのサラダ = 胡椒が付いているサラダ

入り and 付き are suffixes derived from the verbs 入る and 付く. The forms 入り and 付き are the 連用形 renyōkei (masu-stem) of the verbs and behave much like nouns. This is why you see that 砂糖入り modifies お茶, a noun, with の.

For translation you could go for

1. tea containing sugar


2. salad with pepper

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Many verbs do this, by the way. For example the suffix ～生まれ attaches to places and means "born in", e.g.

東京生まれの人
a person born in Tokyo

アメリカ生まれの日本人

a Japanese born in America