Deep
Deep adjective - Difficult for one of ordinary knowledge or intelligence to understand.
Usage example: her poetry is now regarded as sentimental and not very deep
Hard and deep are semantically related in intense in effect on senses topic. In some cases you can use "Hard" instead an adjective "Deep".
Both words in one sentence
- He blushes at the slightest hint of any "funny stuff", takes a while to understand anything, and Claire falls deep and hard for him.
Source: Virginity Makes You Stupid - Well, except for the pit traps, which are really deep and hard to climb out of.
Source: Literature / Bands Of Mourning - Type O Negative were always Doom Metal, but their first album Slow Deep And Hard contained more Thrash Metal influence than their more well known Gothic Metal sound.
Cite this Source
Hard and Deep. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/deep/hard
Deep & Hard. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/deep/hard>.
Hard or Deep. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/deep/hard.
Google Ngram Viewer shows how "deep" and "hard" have occurred on timeline