To be taken up and considered as a factor, idea, or element in something; to become part of something larger.
example
Das Feedback der Kunden wird in die Weiterentwicklung des Produkts einfließen.
Customer feedback will be incorporated into the further development of the product.
Usage tips
Separable verb
'Einfließen' (to flow in / be incorporated) is a separable verb. The prefix 'ein-' comes at the end in a main clause. In subordinate clauses and in the infinitive with 'zu', the verb stays together.
EXAMPLE
Ihre Erfahrungen fließen in das neue Projekt ein.
Her experiences flow into the new project.
Perfect tense with 'sein'
Since 'fließen' (to flow) describes movement, the perfect tense of 'einfließen' (to flow in / be incorporated) is always formed with the auxiliary verb 'sein'. So it is 'ist eingeflossen' (has flowed in / has been incorporated).
EXAMPLE
Das Geld aus der Spende ist direkt in den Bau der Schule eingeflossen.
The money from the donation went directly into building the school.
Sentence structure with 'in'
In the figurative meaning, the verb is almost always used with the preposition 'in' and the accusative. It describes what an idea or factor is incorporated into.
EXAMPLE
Die Wünsche der Mitarbeiter sollen in die neue Urlaubsregelung einfließen.
The employees' wishes should be incorporated into the new vacation policy.
Construction with 'lassen'
The expression 'etwas einfließen lassen' (to work something in) is very common. It means that a person actively, and often subtly, introduces a piece of information or an idea into a conversation or text.
EXAMPLE
Der Redner hat geschickt einige persönliche Anekdoten einfließen lassen.
The speaker skillfully worked in a few personal anecdotes.
Context clue
You can recognize the literal meaning from the subject: if a stream, river, or liquid 'einfließt' (flows in), the literal meaning is intended. With abstract subjects like 'Ideen' (ideas), 'Feedback' (feedback), or 'Geld' (money), it has the figurative meaning.
EXAMPLE
Der Rhein fließt in die Nordsee ein.
The Rhine flows into the North Sea.
Compare with
near_synonym
einfließen vs erwähnen
to mention
'erwähnen' and 'einfließen lassen' can both mean that you bring a piece of information or an idea into a conversation or text. 'erwähnen' is more direct: you mention something briefly. 'einfließen lassen' sounds more subtle and often means that a remark is worked in incidentally or skillfully. The word fits especially when an idea becomes part of a larger text, conversation, or plan. If you simply want to say that something was mentioned briefly, 'erwähnen' is more natural. If you want to emphasize that something was worked in casually, 'einfließen lassen' fits better.
einfließen
Du kannst beim Termin ruhig deine Erfahrungen aus dem Praktikum einfließen lassen.
You can certainly work your internship experience into the appointment.
erwähnen
Er hat den Namen seiner Freundin im Gespräch nur kurz erwähnt.
He only briefly mentioned his girlfriend's name in the conversation.