@stevesmi
Usually, when a word ending in “o” is repeated, the first “o” ending becomes a “u”. I believe that there’s a grammar rule about that. So, you will most likely encounter “ano-ano” as “anu-ano”. I always write it as “anu-ano”, the same way Bituingmaykinang did and by TLDCAdmin in the example he gave.
As TLDCAdmin explained, it is used to indicate plurality. For example:
Ano ang pangalan ng nanay mo? = What is the name of your mother?
Anu-ano ang (mga) pangalan ng mga kapatid mo? = What are the names of your siblings? (Sometimes we just omit the first “mga”.)
There are times when you will see a “kung” before “anu-ano”. (See example given by Bituingmaykinang.) If it is used as part of a question, then "kung anu-ano" takes the simple meaning of “as to what they are”.
Alam mo ba ang kung anu-ano ang mga pangalan ng mga planeta? = Do you know the names/as to what the names of the planets are?
In a declarative sentence, the “kung” modifies the meaning of “anu-ano”. It is still about plurality but suggests a collection of insignificant things, like “odds and ends”. It may also refer to an unspecified set of negative things (not for positive things) about someone.
Examples:
Q: Ano ang gin
ág
awà mo? = What are you doing?
A: Wal
â nam
án, kung anu-ano lang. = Nothing really, just this and that.
Iniiw
asan kong kas
ama si Jack kasi madal
ás kung anu-ano lang ang mga sinas
ábi/pinags
ásasabi niya. = I avoid Jack’s company because often he just talks nonsense.
Galit na galit si Anna sa iyo. Kung anu-ano ang pin
ágsasab
í niya sa akin tungkol sa iyo. = Anna is furious at you. She said a lot of bad things to me about you.