Which < tain> word means, "to keep" or to " keep back."
retained
I retained my ideas by writing notes.
She was retained in the third grade.
Which < tain > word means to "support," or to hold up from below.
The prefix means " up from under."
<sustain>
I need food and water to sustain myself.
It takes work to sustain a friendship.
Which < tain > word means, " hold with" or " hold inside?"
contain
I could not contain my excitement.
What does the dish contain?
Which < tain > word means to " hold in your hand," or to " keep something going."
This word is a compound and this first base "main," has a sense of " hand."
< maintain >
It is hard to maintain curly hair.
I will maintain my dog's fur.
Which < tain > word means "hold off?"
abstain
I will never abstain from eating Taco Bell.
I will abstain from voting.
Which < tain > word means "hold back?"
detain
"I am sorry I was detained at the store."
" I won't detain you any longer; it was nice to see you."
Which <tain> word means " in reference to?"
The prefix has a sense of "through."
pertain
"What does this pertain to?