that cannot be divided into separate parts 分不开的；不可分割的 Atoms were originally thought to be indivisible. 原子最初被认为是不可分割的。 For him, music and lyrics are virtually indivisible. 对他来说，音乐和歌词几乎是不可分割的。
- indivisible (by something) (of a number)
that cannot be divided by another number exactly 分不开的；不可分割的 Primes are indivisible by numbers other than one and themselves. 质数不能由一个数和它们本身除以数字。
Word Originlate Middle English: from late Latin indivisibilis, from in- ‘not’ + divisibilis (from divis- ‘divided’, from the verb dividere ‘force apart, remove’).