上手: (rare) skill, dexterity; flattery (from being told how skillful one is, even if one isn't); a person with the seventh dan in the games of shogi or go

乗ず: archaic for 乗じる: (mathematics) to multiply; to take an opportunity, to seize an advantage / 成ず: (archaic) to become, to become complete; to accomplish or fulfill something

skillful, dexterous

(rare) skill, dexterity / flattery (from being told how skillful one is, even if one isn't) / a person with the seventh dan in the games of shogi or go

the diagram above; the top illustration

(transitive) to talk (about something); to speak (on a subject); to converse / to speak (a language)

Informal form of 話 (hanashi).

continuative of 話す

the Japanese language

What you like to do, you will do well. To improve your skills in something, you must enjoy doing it.