special
特 centers on something standing apart from the ordinary: a special, distinctive, or exceptional quality that sets it apart.
特 combines 牜 (cow) with 寺, which likely contributes the sound. The original meaning was a bull, a special male animal, which extended to the general idea of something special.
A cow 牜 beside a temple 寺: picture a special, sacred cow set apart at the temple, making it exceptional.
For トク, imagine a special talk (トーク) given by the temple cow: talk -> トク, and the cow's special status makes the talk memorable.
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particularly; especially; in particular; expressly
special; particular; extraordinary; exceptional; especial
feature; trait; characteristic; peculiarity; distinction
specific; particular; designated; special
special; particular; peculiar; unique
feature (e.g. newspaper); special edition; report
privilege; special favor; special favour; benefit; prerogative; perk; amenity
peculiarity; uniqueness; characteristic
special characteristic; special quality; trait; idiosyncrasy; peculiarity
patent
limited express (train for which a limited-express ticket is required)
characteristic (of); peculiar (to)
privilege; special right
setting up specially; special installation
unique; peculiar; singular
special skill
special make; deluxe
characteristic; (distinctive) feature; peculiarity; distinguishing quality; special character
extra-large; king-size
special case; exception
being produced in a particular region; local specialty
special training; intensive training; crash course
special investigation
special selection; special approval
special mention
special sale; bargain sale
special attack unit; kamikaze unit; suicide squad
exceptional; unusual; special
strong point; forte; merit; strength
characteristic; feature; special quality
special contract; special agreement; rider (insurance)
Patent Office; Patent Agency
special envoy
specific medicine; wonder drug; silver bullet
emergency demands; special procurement (particularly in time of war)
special pardon; (general) amnesty
discount price; special offer price
special ward; administrative subdivision of a prefecture that has a directly elected mayor and assembly
semigovernmental corporation
(special) correspondent (e.g. for a newspaper)
super express