Englishfor English speakers
in
Preposition
—
Used to show that something is inside something else.
The cat is in the box.
—
Used to show that someone is at home, or is available.
Is John in?
The Doctor is now in.
—
Used to show movement towards the inside.
The rain came in through the window.
Freud
—
noun
Austrian neurologist who originated psychoanalysis (1856-1939)
und
noun
—
(obsolete, rare) A wave.
—
(heraldry) A billow- or wave-like marking.