水平

1. Origins, structure, and basic meaning

• Structure: 水平 (すいへい) is a na-adjectival expression for being level or parallel to a reference plane.
• Basic usage: 水平になる presents a shelf reaching a level state through adjustment, while 水平な台 modifies the platform on which an instrument is placed.

2. Common pitfalls and similar expressions

• Result-state に and attributive な
  • 水平に combines with なる to form a resulting state, whereas 水平な modifies the following noun 台. The に in the first construction is not merely locative.