weitläufig
spacious
Extending over a large area; very roomy or expansive.
Die Wohnung war überraschend hell und weitläufig.
The apartment was surprisingly bright and spacious.

spacious / distant / long-winded
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spacious
Extending over a large area; very roomy or expansive.
Die Wohnung war überraschend hell und weitläufig.
The apartment was surprisingly bright and spacious.

The word consists of 'weit' (wide/far) and '-läufig' (from 'laufen', to run/walk). The basic idea is something that extends or 'runs' far—whether it is a space, a family line, or a story.
Das Schloss ist von einem weitläufigen Park umgeben.
The castle is surrounded by a spacious park.
The meaning of 'weitläufig' (spacious/distant/long-winded) depends strongly on the noun. With places, it means 'spacious'; with people, 'distantly related'; and with language or texts, 'detailed' or 'long-winded'.
Die Hotelanlage ist sehr weitläufig.
The hotel complex is very spacious.
In its spatial meaning, 'weitläufig' (spacious) describes large, open areas. Typical nouns are 'Park' (park), 'Garten' (garden), 'Anwesen' (estate), 'Gelände' (grounds/site), or 'Flur' (hallway/corridor).
Das weitläufige Gelände des Festivals war schwer zu überblicken.
The spacious festival grounds were hard to take in.
This meaning is almost always used in the fixed combination 'weitläufig verwandt sein' (to be distantly related) to express a family relationship that is not close.
Wir sind nur weitläufig miteinander verwandt und treffen uns selten.
We are only distantly related and rarely meet.
scarce / just under / close
'knapp' and 'weitläufig' are opposites when it comes to the style of an explanation or presentation. 'Knapp' means brief and limited to the essentials. 'Weitläufig' means very detailed and often also cumbersome or digressive. A brief answer gets to the point quickly. A long-winded answer contains many details and may lead away from the topic.

Der Bericht war so weitläufig, dass viele Leser den Hauptpunkt übersehen haben.
The report was so long-winded that many readers missed the main point.
Frau Schwarz erklärt den Plan am Montag nur knapp.
Ms. Schwarz explains the plan only briefly on Monday.