sehr
very
Intensifies the meaning of an adjective or adverb and means 'to a high degree'.
Der Film war sehr spannend.
The film was very exciting.

very
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very
Intensifies the meaning of an adjective or adverb and means 'to a high degree'.
Der Film war sehr spannend.
The film was very exciting.

English-speaking learners often incorrectly use 'so' to intensify adjectives. In German, `sehr` is the neutral word for 'to a high degree' (very).
Das Essen schmeckt sehr gut.
The food tastes very good.
As an adverb of intensification, `sehr` (very) stands directly before the adjective or adverb it modifies. It cannot stand between the article and the adjective.
Das ist ein sehr altes Haus.
That is a very old house.
When `sehr` (very/greatly) intensifies a verb or a feeling connected with a verb, it usually stands at the end of the sentence or after the direct object.
Ich danke Ihnen sehr für Ihre Hilfe.
I thank you very much for your help.
`sehr` (very/greatly) is often used with verbs that express feelings or appreciation. Typical combinations are `sich sehr freuen` (to be very happy), `sehr lieben` (to love very much), `sehr danken` (to thank very much), or `sich sehr wundern` (to be very surprised).
Ich habe mich sehr über dein Geschenk gefreut.
I was very happy about your gift.
something / somewhat
'etwas' and 'sehr' can both describe the degree of a quality or feeling. The difference is in the strength. 'etwas' means 'a little' and makes a statement weaker. 'sehr' strongly intensifies a statement. For example, you say 'etwas müde' (somewhat tired) when the tiredness is only slight, and 'sehr müde' (very tired) when it is strong.

Ich freue mich sehr auf die Reise morgen.
I am very much looking forward to the trip tomorrow.
Nach dem langen Termin ist Herr Meier etwas müde.
After the long appointment, Mr. Meier is somewhat tired.