Mark (given name) / (computing) Mach kernel

to mark, to put a mark (on something) / to set a record (to achieve or note the most extreme example of some variable, such as the highest score in a sport)

(familiar or childish, diminutive) title affixed to people's names: -chan / title affixed to animals

(teen girl's slang) Alternative spelling of ちゃん (chan)

fine residence, shop, store; (ghost character)

(informal, possibly dialect) one's own father / (by later extension) the head or master of an establishment such as a teahouse, boathouse, etc.

(teen girl's slang) Alternative spelling of ちゃん (chan)

(Internet slang, cutesy) Alternative spelling of ちゃん (-chan)

chance (an opportunity or possibility)

(term of endearment) mum, mommy