简言之

簡言之
jiǎnyánzhī
  1. in simple terms
  2. to put things simply
  3. briefly

CEDICT

in brief; in short; to put it in a nutshell; basically

Wiktionary

Entry Composition

1 简 jiǎn
  1. simple
  2. uncomplicated
  3. letter
  4. to choose
  5. to select
  6. bamboo strips used for writing (old)
2 言 yán
  1. words
  2. speech
  3. to say
  4. to talk
3 之 zhī
  1. (possessive particle, literary equivalent of 的 de)
  2. him
  3. her
  4. it

Related entries

简单明了 jiǎndānmíngliǎo
  1. clear and simple
  2. in simple terms
就沒有更簡單明瞭的說法表達這件事嗎？

Isn't there a much better and shorter way of saying the same thing?

Source: Tatoeba

简短 jiǎnduǎn
  1. brief (statement, summary etc)
  2. briefly
  3. brevity
我们简短地谈了谈。

We spoke briefly.

Source: Tatoeba

简述 jiǎnshù
  1. to outline
  2. to summarize
  3. to sketch
  4. summary
  5. brief description
  6. concise narrative
  7. in a nutshell
  8. briefly