mind / mined are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
mind: (noun) that which is responsible for one's thoughts and feelings; the seat of the faculty of reason. (noun) recall or remembrance. (noun) attention. (noun) your intention; what you intend to do. (noun) knowledge and intellectual ability. (verb) be offended or bothered by; take offense with, be bothered by. (verb) be concerned with or about something or somebody. (verb) keep in mind.
mined: (verb) get from the earth by excavation. (verb) lay mines. (adjective) extracted from a source of supply as of minerals from the earth.
mind: m·AY·n·d
mined: m·AY·n·d
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)