The prefix an- ( or a- before a consonant) is cognate with English un- . Found chiefly in scientific terminlogy, it negates the term it is prefixed to. For example an-hydrous means un-watery, a-pathetic means un-caring.
The reverse repo rate is the rate at which banks park their short-term excess liquidity with the Central Bank, while the repo rate is the rate at which the Central Bank pumps in short-term liquidity into the system.
If you mean the rate - some of the larger supermassive black holes engulf matter at the rate of over a thousand solar masses a year. However, they don't do this all the time; it seems that such a rate cannot be sustained in the long term.
The precaution of short term interest rate is that the rate tends to be higher due to its term. Long term interest rate, on the other hand, tends to be lower, but since it will take a long time to pay off debt, in the long run, the accumulated interest rate becomes much more.
Decreasing term insurance means from the perspective of finance that it is annual and renewable. It gives a death benefit that decreases at a rate that has already been determined over the life of the policy.