A person who instructs or supervises others in drilling techniques or military drill exercises.
Compound from 'drill' and 'master' (from Old English 'magister' via Old French). The term emerged in military contexts and later extended to trades and professions.
Military drillmasters literally shaped history—the precision of formations they taught gave organized armies a tactical advantage, which is why drill sergeant training is still brutally demanding today.
Authority/expertise role encoded with masculine default. 'Master' carries centuries of gender-neutral but male-assumed leadership terminology.
Use 'drill instructor' or 'drilling supervisor' for clearer, gender-neutral framing of the instructional role.
["drill instructor","drilling supervisor","drill leader"]
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