Meanings

one country, two systems (Chinese policy allowing for areas such as Hong Kong to maintain their own economic and administrative systems)

body drop throw (sweeping the opponent's legs and throwing them forward)

holding two positions at once (esp. of rikishi or judges who are also coaches)

frustratingly difficult task

soft windflower

conjugation (inflection, declension) of nidan verbs (resulting in a stem of either "i" or "u" for every conjugation)

conjugation (inflection, declension) of nidan verbs (resulting in a stem of either "e" or "u" for every conjugation)

conjugation of nidan verbs

someone with a dual personality

second-person pronoun

two sickles used in Okinawan Kobudo

vinegar and soy sauce mixed in roughly equal proportions

manganese dioxide (MnO2)

second law of thermodynamics

potassium dichromate (K2Cr2O7)

kanji "ice" radical

kanji "twenty legs" radical (radical 55)

twelve words used to mark the old calendar as indicators of lucky and unlucky activities

28 mansions of Chinese astronomy (constellations dividing the ecliptic into 28 positions)

right in half