BT AZ 38b(34) :ותרו בה גרגישתא ומדבקין ליה בגויהו‏ : they soak pure clay in them [i.e. the pots], and (the seeds) stick to it inside them
See the entire entry for dbq vb. to stick to, to adhere

BT AZ 38b(34) :ושבקי ליה עד דמקבל‏ : they leave it alone until it darkens [or read as p.p.?]
See the entire entry for qbl#3 vb. to become dark