From Teflpedia

Seek is an English verb.

Seek is an irregular verb - it has the third person form seeks, the ing form seeking, but an irregular preterite and past participle 'sought'.

Seek is a transitive verb; one has seek something. Contrast look which is an intransitive verb with broadly similar meaning, so we seek something but look for something.

Sought can be a homophone with sort in non-rhotic accents. If th is substituted for /s/ then sought can be a homophone with thought (from think).

Note the phrasal verb "seek out" which just means seek.

Note the adjective "sought after"