knowledge of, knowing something of, experience in / regulations, instructions

Classical Japanese form of 心得る (kokoroeru)

live a life

life; livelihood; daily living.

a book / a script; a scenario / source; origin; root

just

get, acquire, gain, obtain, win, catch / be able to, can / (in the form ざるを得ない following the imperfective form of a verb) cannot help but doing, cannot but do

to obtain (benefit) / be able to, -able

cannot

blades of grass and tree trunks / falcons