The Spanish word 'mamotreto', meaning 'bulky object', has an interesting origin that traces back to Ancient Greek. It comes from the Greek compound 'mammothreptos' (μαμμόθρεπτος), which literally meant 'raised by grandmother'. This compound was formed from two Greek words: 'mamme' (μάμμη) meaning 'grandmother' and 'threptos' (θρεπτός) meaning 'nursed' or 'reared'.

The word entered Spanish through Latin 'mammothreptus'. The semantic shift from 'raised by grandmother' to 'bulky object' likely occurred because children raised by grandmothers were stereotypically thought to be spoiled and overfed, leading to the association with something large or unwieldy.

While 'mamotreto' is a relatively uncommon word in Spanish, you might recognize parts of related words like 'mama' (mom) which shares the ancient root relating to maternal care, though this is a much more distant connection.

While there aren't any common English words directly related to 'mamotreto', English does have some words that share the Greek root 'mamm-' relating to 'breast' or 'mother', such as 'mammary' and 'mammal'. These words reflect the original connection to nurturing and maternal care, though they've developed along different semantic lines than the Spanish 'mamotreto'.