impeccable
Loading your saved state.
impeccable
Completely without errors, flaws, or blemishes; perfect in every respect. Can refer to appearance, behavior, performance, or the condition of an object.
Sein Auftreten bei der Konferenz war tadellos.
His conduct at the conference was impeccable.
The word is made up of 'der Tadel' (criticism/rebuke) and the ending '-los' (without). Something that is 'tadellos' (impeccable) is therefore literally 'without reproach' or without reason for criticism.
Ihre Arbeit war tadellos und wurde von allen gelobt.
Her work was impeccable and was praised by everyone.
'Tadellos' (impeccable) often describes things for which high standards are expected. Common combinations are 'tadelloses Verhalten' (impeccable behavior), 'tadellose Kleidung' (impeccable clothing), 'tadellose Arbeit' (impeccable work), or an object 'in tadellosem Zustand' (in impeccable condition).
Für das Vorstellungsgespräch wählte er einen tadellosen Anzug.
For the job interview, he chose an impeccable suit.
'Tadellos' (impeccably) can also be used as an adverb to describe how an action is performed. It then means 'perfectly' or 'without mistakes'.
Der Pianist spielte das schwierige Stück tadellos.
The pianist played the difficult piece impeccably.
perfect
'perfekt' and 'tadellos' are close in meaning because both can describe something without errors or flaws. 'perfekt' is very general and is used in everyday language for many things, including when something simply fits ideally. 'tadellos' sounds a bit more precise and often also somewhat more formal. It means that there is nothing to criticize, for example in a performance, behavior, appearance, or the condition of something.
Nach der Reparatur funktioniert das Fahrrad wieder tadellos.
After the repair, the bike works perfectly again.
Du hast die Präsentation perfekt vorbereitet.
You prepared the presentation perfectly.