How to say "You are the reason" in Sindarin with Tengwar script?

[slessard]

I would like to have the words "You are the reason" in Sindarin using Tengwar script. Complete rookie here. This is for a tattoo for a friend

 

[ZehnWaters]

I would like to have the words "You are the reason" in Sindarin using Tengwar script. Complete rookie here. This is for a tattoo for a friend

There's only a couple of people skilled in Sindarin and they're not on all of the time.

 

[Gilruin]

I would suggest le i·gaeth/ci i·gaeth, the first using formal ‘you’, the second familiar ‘you’. This distinction roughly corresponds to whether you’d choose to refer to someone by their first or last name in English.
There is no good word for ‘cause, reason’ in Sindarin. The word I used, caeth/i·gaeth, is an adaption from Gnomish, a conceptual predecessor of Sindarin in Tolkien’s life, which has √KAHA > caith “cause, reason, motive”. There is a later root √KYAR, but unfortunately this doesn’t yield distinctive results in Sindarin.

 

[Elbereth Vala Varda]

As Gilruin said, it doesn't seem like a direct translation. You would need to do a neo-sindarin work that roughly means the same thing.