1.
N-, -an; pa-, caus.
to secure.
This word applies to a variety of situations such as tightening a cover, wrapping or winding a rope, wrapping a sarong firmly
around the waist, firmly tying a knot, locking a house, putting away valuables, hiding things, etc.
Secure [your grip] on what you are holding.
Secure the thing [that] you are putting away under cover.
Secure the knot tied by you [for the] boat.
Put up the money for me, make [it] very secure.
Put the money up very securely for me.
3.
pa-, caus.
‘secret’ to keep
a
secret; to keep confidential.
In this sense, the word can be thought of as "securing information".
Keep that conversation a secret. Don't broadcast [it].