Indicates that something is included or furnished (as a suffix: ~tsuki); used for rooms, plans, prices, etc., that come with something.
家具付きのアパートを借りた。
I rented a furnished apartment.
このツアーは朝食付きです。
This tour includes breakfast.
税込み・サービス料込みの料金表で、別途料金はありません（〜付きの表現）。
The price list shows tax-included and service-included rates, so there are no extra charges (example of ～tsuki).
Attached to; fixed or affixed to something (as a suffix: ~tsuki).
このジャケットは内ポケット付きで便利だ。
This jacket is convenient because it has inner pockets.
窓には網戸付きだから虫が入らない。
The window has a screen attached, so insects don't get in.
棚付きの机を買った。
I bought a desk with shelves attached.
Appearance or impression (as in facial expression, build); describes how someone or something looks.
彼は疲れた顔つきで帰ってきた。
He came home with a tired look on his face.
その建物は威圧的なつきがある。
That building has an intimidating appearance.
子どもの体つきがしっかりしてきた。
The child's physique has become more solid.
Luck or fortune (usually written in kana); used in phrases like 'have good luck' or 'have bad luck'.
最近つきがいいから、くじで当たった。
I've been lucky lately, so I won a lottery.
試験の日に雨に降られて、つきが悪かった。
It rained on the exam day — I had bad luck.
勝負事はつきも大事だ。
Luck matters in games of chance as well.
Sociality or how someone relates to others (e.g., ability to get along with people).
彼は人付きがいいので、誰とでもすぐ仲良くなる。
He gets along well with people, so he becomes friends with anyone quickly.
新しい職場では人付きが試される場面がある。
In a new workplace there are situations that test your social skills.
彼女は付き合いが良くて、飲み会にいつも来る。
She is sociable and always comes to drinking parties.
Someone attached to or assisting a particular person; an assistant role (as a suffix: ~tsuki), e.g. 'assistant to the manager'.
課長付きの秘書として働いている。
I work as a secretary attached to the section manager.
部長付きの運転手がいる会社もある。
Some companies have drivers assigned to department heads.
お付きの者が彼のそばを離れない。
An attendant never leaves his side.
Used on menus or product descriptions to indicate that something is included (e.g., 'with soup' meaning soup comes with the meal). In such contexts it can refer to the included soup itself.
このランチはサラダとスープ付きで800円です。
This lunch comes with salad and soup and costs 800 yen.