Both uses come from the verb mount, and the verb holds two everyday actions that are easy to see at once: something goes up, and something gets put up onto something else. Follow the first action and you watch a pile grow — bills, pressure, criticism, one more added and then one more — and that is the adjective. Follow the second and you end up looking at whatever the thing was put onto: the rubber block under an engine, the plate a camera screws into — and that is the noun. One word, two directions out of the same small movement upward.
From the word’s history
Both entries are mount plus the ending -ing, so the difference is not in the parts but in which action of mount the ending caught.
兩個用法都是 mount 加上 -ing。差別不在組成，而在 -ing 抓住的是 mount 的哪一個動作：是「往上加」，還是「架上去」。
Wiktionary entries for mounting (packet source_refs kaikki:3f6f69a190036ae4:905399258:4254 and :905404593:2571): From mount + -ing.
登入就可以看每一支怎麼連回核心畫面。
原始詞典資料4 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
mountingadj/ˈmaʊntɪŋ/
- 1
That continues to mount; steadily rising or accumulating.
- mounting debts
- steadily mounting losses
mountingnoun/ˈmaʊntɪŋ/
- 1
Something mounted to support something; an attachment.
- The underframe also carries four bonded-rubber mountings, focused upwards and inwards towards the centre of gravity to suspend the body shell.
- That particular plane must have hit an obstruction that ripped its undercarriage right off its mountings, to leave it suspended beneath.
- 2
The act of one who mounts.
- The stage we had now commenced was eighteen miles in length; but the frequent mountings and dismountings, to climb or to descend the rocky sides of the mountains, made it appear much longer.
這個拼法也被記錄為下列字的變化形：
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。