nothing ventured, nothing gained

enter

tiger's den / (figuratively) danger spot; dangerous place

a child / (figuratively) a girl, especially a dear or desired one (compare use of English baby, babe) / a smaller or younger version of a bigger object

a tiger (The mammal Panthera tigris)

to go in; to come in / 要る: to be necessary, to be required

to enter, go into, get into a place or a thing / to join a group or organization / to be contained (in), to be included (in) / to be a member of a group, set, category

cannot

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