“‘My dear old fish,’ said Mr Wonka, ‘go and boil your head!’” – he probably didn’t know about this saying.
(Marui tamago mo kiriyou de shikaku;
“Even a round egg can be square, depending on how you cut it.”)
A given thing will go smoothly – or not – depending on your choice of words and methods. Be careful, because the same essential content can create different impressions, or even cause offense, depending on the presentation. The devil’s in the details. Despite the image being the presentation of a cooked egg – in a way that gives it “horns,” despite the inoffensive roundness of its original shape – this saying mostly seems to refer to watching one’s tone while speaking.
We begin with the adjective 丸い (marui), “round,” preceding and modifying the noun 卵 (tamago), “egg.” This is marked by the emphatic particle も (mo) as an extreme example of a given rule; “even.” The rule begins with the verb 切る (kiru), “to cut,” in prenominal form and acting as a noun; it is compounded with the noun よう (you, pronounced as a long “yo”), “form,” “style.” The compound is marked by the particle で (de) as the means by which something happens, but this is simply followed by the noun 四角 (shikaku), literally number-noun “four corners,” i.e. a rectangle or square. Any other structures or verbs are elided.
This phrase is considered synonymous with, and sometimes followed by, the phrase 物も言いようで角が立つ (mono mo iiyou de kado ga tatsu), “a thing can cause offense depending on how it is said.”
(“Gakkou no kyoushi mo sou kamoshirenai kedo, chuutaa wa toku ni, marui tamago mo kiriyou de shikaku de, kuraianto no machigai wo naosu toki wa, kankei wo sokonenai you ni kotobadzukai ni ki wo tsukenai to ikemasen.”)
[“It’s probably the same for school teachers but especially for tutors, because presentation matters as much as content, when correcting a client’s mistakes, you need to pay careful attention to how you phrase things so as not to damage your relationship with them.”]