深入

to penetrate deeply / thorough

old variant of 深[shen1]

deep / depth / deeply / (of a color) dark / deep / rich

deep (lit. and fig.)

to enter / to go into / to join / to become a member of / to confirm or agree with / abbr. for 入聲|入声[ru4 sheng1]

to enter deeply into people's hearts / to have a real impact on the people (idiom)

see 深入淺出|深入浅出[shen1 ru4 qian3 chu1]

to explain a complicated subject matter in simple terms (idiom) / (of language) simple and easy to understand