מְרִירוּת

From LSJ

παιδείαν δὲ πᾶσαν, μακάριε, φεῦγε τἀκάτιον ἀράμενοςflee all education, raising up the top sail

Source

English (Strong)

from מָרַר; bitterness, i.e. (figuratively) grief: bitterness.