κεφαλαιοῦν

From LSJ

ὁ μὴ πεπλευκὼς οὐδὲν ἑόρακεν κακόν → anyone who hasn't sailed has never seen trouble

Source

Greek > English (Woodhouse Verbs Reversed)

(see also: κεφαλαιόω) sum up

Lexicon Thucydideum

summam rei paucis complecti, to sum up the matter briefly, 3.67.7, 6.91.7, 8.53.1.