기계식

In a sentence

• 나는 기계식 자판을 사용한다.

  I use a mechanical keyboard.

  Here, '기계식' modifies '자판' (keyboard), emphasizing the type of keyboard being mechanical as opposed to other types.

• 기계식 시계는 정교함이 특징이다.

  Mechanical watches are characterized by precision.

  In this sentence, '기계식' describes '시계' (watch), identifying that the watch operates with mechanical mechanisms.

• 기계적인 과정만 반복하는 것이 지루할 수 있다.

  It can be boring to repeat only mechanical processes.

  Here, '기계적인' is derived from '기계식' to mean 'mechanical' in behavior, describing a repetitive, non-human-like aspect of actions.