This is the 11868th most frequent German word.
tiefgang
Depth; profundity; or draft (nautical).
Here, 'Tiefgang' refers to intellectual or emotional depth in a literary work.
Das Buch hatte einen erstaunlichen Tiefgang und regte zum Nachdenken an.
The book had an astounding depth and prompted reflection.
Here, 'Tiefgang' is used in a nautical context, indicating the draft of a vessel, which is the depth of the vessel's hull below the waterline.
Das Schiff verfügt über einen großen Tiefgang, was für tiefere Gewässer notwendig ist.
The ship has a significant draft, which is necessary for deeper waters.
In this sentence, 'Tiefgang' describes the profoundness and intellectual quality of someone's arguments or discourse.