in place editing using awk

Question

I want to add a line at top of file say f1 using awk
Is there a better way than :
awk 'BEGIN{print "word"};{print $0}' f1 > aux;cp aux f1;\rm aux
does awk has something like -i option in sed.

Answer 1

Why not use sed - it would make the solution more straightforward

$sed -i.bak '1i\
word
' <filename>

Answer 2

An alternate way to do this is
sed -i '1s:^: Word1\nWord2 :' file