Sychedu, to thirst, to be thirst
Sychiant, n. a desiccation
Sych-hin, n. dry weather
Sychu, v. to dry, to wipe dry
Sychwydd, n. dry wood, fuel
Sydyn, a. abrupt, sudden
Sydynrwydd, n. suddenness
Sydd, v. is, exists
Syfa, n. a riddle, a sieve
Syfag, n. what spreads out