effeithloneddau

noun plural
in English is:

efficiencies

Use

yr effeithloneddau hyn
fy effeithloneddau i
dy effeithloneddau di
ei effeithloneddau ef/o
ei heffeithloneddau hi
ein heffeithloneddau ni
eich effeithloneddau chi
eu heffeithloneddau nhw/hwy
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