What is the meaning of Sinke?

Person, especially (school) children, who is lacking in intelligence compared to their peers.

fool, idiot

to delay

partitive plural of sink

inflection of sinken:

  1. first-person singular present
  2. first/third-person singular subjunctive I
  3. singular imperative

first-person singular present

first/third-person singular subjunctive I

singular imperative

to sink

to sink

Source: wiktionary.org