IPA: /ˈfiːldˌpiːs/
KK: /ˈfildˌpīs/
A type of mobile artillery weapon, such as a gun or howitzer, designed for use in military operations on the battlefield.
The army deployed several fieldpieces to support the infantry during the operation.
The word 'fieldpiece' is formed from 'field' (from Old English 'feld', meaning an open land or area) and 'piece' (from Old French 'piece', meaning a part or section). Together, 'fieldpiece' refers to a part or section of open land, often used in the context of artillery or military equipment designed for use in open areas.
Think of an 'open land' ('field') and a 'part' ('piece') — together they describe a specific section of land, which is what a fieldpiece refers to.
No commonly confused words.