deepen

v.

deepening

v.

go deeper

deepened

v.

deepens

v.

dig a little deeper

#earth

dig deep

adj., v.

#question

dig out

v.

#earth

investigate further

leave no stone unturned

adj., v.

burrow

delve

excavate

v.

find out more

investigate

v.

#question

probe deeper

root

attack

adj., v.

#question

contest

adj., v.

#question

digging deeper

do more

exert oneself mentally

explore further

look into

v.

#question

make a lot of effort

move heaven and earth

adj., v.

probe

v.

#question

push

adj., v.

#question

rootle

seek

adj., v.

spare no effort

adj., v.

#question

tackle

adj., v.

#question

test

adj., v.

#question

think deeper

tunnel

accost

v.

#question

address

v.

#question

agitate against

v.

#question

aim

adj.

altercate

v.

#question

analysis further

answer

v.

#question

apply oneself

adj.

argue

v.

#question

argue against

v.

#question

argue the pros and cons of

v.

#question

argue with

v.

#question

ask

v.

#question

ask further

ask one around