
die Erfindung
invention
A newly developed thing or new process that did not exist before.
Das Smartphone ist eine Erfindung, die unseren Alltag verändert hat.
The smartphone is an invention that has changed our everyday life.
invention
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invention
A newly developed thing or new process that did not exist before.
Das Smartphone ist eine Erfindung, die unseren Alltag verändert hat.
The smartphone is an invention that has changed our everyday life.

invention
The process of inventing; the creative activity that leads to something new.
Die Erfindung des Buchdrucks hat die Verbreitung von Wissen revolutioniert.
The invention of printing revolutionized the spread of knowledge.

fabrication
A made-up story that is not true; a lie or fiction.
Seine abenteuerliche Ausrede war von Anfang bis Ende eine reine Erfindung.
His adventurous excuse was a pure fabrication from beginning to end.
'Die Erfindung' (the invention) belongs to the verb 'erfinden' (to invent). This is derived from 'finden' (to find). The prefix 'er-' often indicates a successful result, so the finding of something new. The ending '-ung' turns the verb into a feminine noun.
Wer hat eigentlich das Rad erfunden?
Who actually invented the wheel?
When referring to a new thing, 'Erfindung' (invention) is often combined with the verb 'machen' (to make). Adjectives such as 'bahnbrechend' (groundbreaking), 'genial' (brilliant), or 'nützlich' (useful) are also typical.
Der Ingenieur hat eine bahnbrechende Erfindung gemacht.
The engineer made a groundbreaking invention.
To describe the process of inventing, 'Erfindung' (invention) is often used with a genitive or a 'von' construction that indicates what was invented.
Die Erfindung des Papiers war für die Menschheit von großer Bedeutung.
The invention of paper was of great importance for humanity.
You can often recognize the meaning 'Lüge' (lie) or 'Fiktion' (fiction) from words such as 'rein' (pure), 'frei' (free), or 'bloß' (mere). The phrase 'eine freie Erfindung' means that something is completely made up.
Die Geschichte vom Monster im See ist nur eine reine Erfindung.
The story about the monster in the lake is just a pure fabrication.
construction
Konstruktion and Erfindung can both refer to a representation that is not based on the truth. Erfindung usually directly names the made-up story or lie, while Konstruktion places more emphasis on the artificially constructed presentation. Use Erfindung for a clear lie and Konstruktion for an artificially developed explanation.

Seine Geschichte über den Unfall war eine vollständige Erfindung.
His story about the accident was a complete fabrication.
Seine Erklärung war eine komplizierte Konstruktion ohne echte Belege.
His explanation was a complicated construct with no real evidence.