This is the 23rd most frequent German word.
aber
"Aber" means "but" in English.
In this sentence, 'aber' is a conjunction being used to express a contrast between the desire to participate and the lack of time. It functions similarly to 'but' in English.
Ich möchte gerne teilnehmen, aber ich habe keine Zeit.
I would like to participate, but I do not have time.
In this example, 'aber' serves as a conjunction to introduce a restrictive or opposing idea, contrasting the goodness of the offer with its unsuitability for the speaker's context.
Das Angebot ist gut, aber für uns ungeeignet.
The offer is good, but unsuitable for us.
Here, 'aber' is used as an intensifier within an exclamatory sentence, emphasizing the admiration or positive remark about something being nice.