无线 wúxiàn wireless
How to remember 无线: 无 have not + 线 line = wireless.
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How it is used
- Wireless - 无线网络 (wúxiàn wǎngluò) wireless network, 无线耳机 (wúxiàn ěrjī) wireless earbuds, 无线电 (wúxiàndiàn) radio.
- Transparent tech compound (无 no + 线 wire). Opposite 有线 (yǒuxiàn, wired/cable) - 有线电视 (yǒuxiàn diànshì) cable TV.