1 to understand

2 to realize

3 to find out

1 poison

2 to poison

3 poisonous

4 malicious

5 cruel

6 fierce

7 narcotics

1 venomous sting

1 to comprehend

2 to understand

3 comprehension

4 understanding

1 to bring relief

2 to alleviate (a crisis)

3 to dull (a pain)

1 lit. to know one and understand half (idiom); a smattering of knowledge

2 dilettante

3 amateur

1 lit. not requiring a detailed understanding (idiom); only looking for an overview

2 not bothered with the details

3 superficial

4 content with shallow understanding

1 lit. a mouth spitting with poisonous flames

2 to speak angrily to sb (idiom)

1 to be good at understanding others (idiom)

1 to be at a loss (idiom)