If rain is water,water is road,road is cloud,cloud is sky,sky is sea and sea is path,where do aeroplanes fly?

If in a certain language $KINDLE$ is coded as $ELDNIK$,how is $EXOTIC$ coded in that code?

If $BELIEF$ is written as $afkledi$,how is $SELDOM$ written in that code?

In a certain code,$786$ means 'study very hard',$958$ means 'hard work pays' and $645$ means 'study and work'. Which of the following is the code for 'very'?

In a certain code,$4$ il be pee $9$ means 'roses are blue',$sik$ hee $9$ means 'red flowers' and $pee$ mit hee $9$ means 'flowers are vegetables'. How is 'red' written in that code?

In a certain code language,'$123$' means 'bright little boy','$145$' means 'tall big boy' and '$637$' means 'beautiful little flower'. Which digit in that language means 'bright'?