Bekhorot 20: words to know

מְחַוַּורְתָּא (Mehavarta): It is clear. Used to confirm the conclusion that Rabbi Yishmael holds in accordance with Rabbi Meir.
דְּחָיֵישׁ לְמִיעוּטָא (Dehayeish lemi'uta): Concerned for a minority. Refers to the legal principle of taking an unlikely possibility into halakhic account.
טִינּוּף (Tinuf): Murky uterine discharge indicative of previous birth. Discussed as a physical sign that exempts subsequent offspring from firstborn status.
מִקְצָת הַיּוֹם כְּכוּלּוֹ (Miktzat hayom kekhulo): Part of the day is like the entire day. Invoked to determine whether the animal's pregnancy could conclude precisely within its first year.
אֵיפוֹךְ (Eifokh): Reverse the opinions. Used to resolve a contradiction by swapping the attributed views of Rabbi Yehoshua and Rabbi Akiva.