4 pictures 1 word, what's the word?

Ahh! I just got the game, and to be honest I think I'm not very good! Anyway, I have an iPhone 4s and it's updated and everything. The game is also updated all the way. The word's four characters long, and there's just a hand writing on what I think is a check with a pen, someone writing with a quill(the writing's all fancy), a wooden sign pointing right, and a yellow sign like what you would see driving down the road with a kangaroo and 'next 100 km' under it. The letters are: n, t, l, d, s, p, h, k, c, g, i, and n.

Sign

Sign?

like you SIGN a check
SIGN with a quill
wooden SIGN
road SIGN