(i dân, o thân), only attested as -dan or -than as the final element of compounds, e.g. Círdan ”Ship-maker”). Construct tan, pl. tain (i thain)
Sindarin
thain
adjective. law-abiding, regular, normal, *lawful, formal, according to custom
thain
noun. law, rule
tann
sign
tân
maker
theinas
noun. law, rule
(i dann), construct tan, pl. tain (i thain)** **(MR:185)