Plural of 'having'; possessions or things that are owned; assets or property.
From 'having' (the gerund or noun form of 'have') plus '-s' (plural marker). This archaic plural treats the gerund as a countable noun, similar to how 'doings' or 'sayings' work in English.
Havings is almost-archaic—you might see it in old legal documents describing 'all my havings and holdings,' but modern English prefers 'possessions' or 'property.' Yet it shows how English can nominalize almost any verb into abstract concepts!
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