便宜
biàn yí
convenient
convenient (便) + suitable (宜) = good value, cheap
Something both convenient and fitting for one's situation naturally comes at a price that feels right — hence the extended meaning of 'inexpensive.' The shift from 'convenient and appropriate' to 'cheap' reflects how affordability is itself a kind of suitability.
这条路走起来很便宜。
zhè tiáo lù zǒu qǐ lái hěn biàn yí。
This road is very convenient to walk.
住在公司附近便宜行事。
zhù zài gōng sī fù jìn biàn yí xíng shì。
Living near the company makes it convenient to act as the situation demands.