The use of verbs was first selected as a metaphor for grammar, which Pongsiriwet (2001: 5) proved to be a significant contributor to writing mistakes

employ- C1 [ T ] formal
to use something:
Sophisticated statistical analysis was employed to obtain these results.

is carried out in accordance with

discourse
noun
US 
/ˈdɪs.kɔːrs/
[ C or U ] LANGUAGE specialized
the use of language to communicate in speech or writing, or an example of this:
Ellipsis is a characteristic feature of spoken discourse.
2) discussion or debate (= formal or political argument), or an example of this:
On social media, angry and aggressive voices seem to dominate the discourse
3) formal
a speech or piece of writing about a particular, usually serious, subject:
She gave a discourse on the nature of life after death.
complementary
adjective
/ˌkɒmplɪˈmentəri/ US 
different but useful or attractive when used together: good together
complementary roles/skills/strengths The complementary skills among the three executives created an effective leadership team.
complementary to one another = bir-birini to'ldiruvchi
property
B1) an object or objects that belong to someone:

B2)
a building or area of land, or both together:

property noun ⁽_QUALITY⁾

a quality in a substance or material, especially one that means that it can be used in a particular way:
One of the properties of copper is that it conducts heat and electricity very well.
Sorry, the bridge is out of order
Step aside, boy
Shade
something that is slightly different from other, similar things:
They are hoping to satisfy all shades of public opinion.
There are several shades of meaning in that sentence.
eloquently
adverb US /ˈel.ə.kwənt.li/
in a way that gives a strong, clear message:
He spoke eloquently.
violate
verb ^[ T ]
US 
/ˈvɑɪ·əˌleɪt/
to break or act against something such as a law, agreement, or principle, or to not respect something that should be treated with respect:
The planes appear to have deliberately violated the cease-fire agreement.