To cause pain or suffering.

eg: The disease afflicts millions of people each year.

(a)  

place where scientists conduct experiments

(a)  

= roof

(a)  

= sign, signal

(a)  

= modern

(a)  

To make something stronger or more effective.

= support

(a)  

= law, rule

(a)  

= organize, set up

(a)  

To find and choose new people to work.

(a)  

>< unimportant

(a)  

= popular, common

(a)  

prevent or slow down sth

(a)