弱い vs か弱い?

[kinokage]

How is kayowai different from yowai? Both seem to mean weak/fragile. I haven't been able to find an example with a kanji for "ka" that would add nuance. Is yowai more physical (弱い vs 強い)?

「人はか弱い、か弱いものですね。」

Thanks!

[kurisuto]

According to Goo, か is a prefix mostly used with -i adjectives, that adds emphasis. Apparently it's never written in kanji. So, apart from the added emphasis, か弱い means the same thing as 弱い.

[kinokage]

According to Goo, か is a prefix mostly used with -i adjectives, that adds emphasis. Apparently it's never written in kanji. So, apart from the added emphasis, か弱い means the same thing as 弱い.

なるほど。 Goo is a little intimidating for me, even with Rikaichan. This is a big help. Thank you.