schleppend
sluggish
Describes a process that moves forward only very slowly, laboriously, and with delays.
Die Verhandlungen zwischen den Parteien verliefen äußerst schleppend.
The negotiations between the parties proceeded extremely sluggishly.

sluggish / dragging
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sluggish
Describes a process that moves forward only very slowly, laboriously, and with delays.
Die Verhandlungen zwischen den Parteien verliefen äußerst schleppend.
The negotiations between the parties proceeded extremely sluggishly.

'Schleppend' (sluggish/dragging) is the present participle of the verb 'schleppen' (to drag something heavy). It describes a movement or process that is so slow and laborious that it is as if you were dragging something heavy.
Der Bau des neuen Hauses kommt nur schleppend voran.
The construction of the new house is progressing only sluggishly.
As an adverb, 'schleppend' (sluggishly) often describes the slow progress of processes. Typical verbs are 'verlaufen' (to proceed), 'vorangehen' (to make progress), 'laufen' (to run/proceed), or 'beginnen' (to begin).
Wegen der vielen Fragen kam die Diskussion nur schleppend in Gang.
Because of the many questions, the discussion only got going sluggishly.
When 'schleppend' (dragging) describes a movement, it is used as an adjective before a noun. Common combinations are 'schleppender Gang' (dragging gait) or 'schleppende Schritte' (dragging steps).
Der alte Mann ging mit schleppendem Gang durch den Park.
The old man walked through the park with a dragging gait.
fast / quick
'schnell' and 'schleppend' describe opposites in terms of speed and how something progresses. 'schnell' means that something happens in a short time or at high speed. 'schleppend' means that something moves forward only slowly, with effort, and with delays. This can be a conversation, a project, or even a movement. 'schleppend' is especially suitable when something is not running smoothly and feels effortful or drawn-out.

Die Verhandlungen kamen nur schleppend voran.
The negotiations made only slow progress.
Vor dem Termin lief im Restaurant alles schnell.
Before the appointment, everything in the restaurant moved quickly.