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Latin lacus
← Old English lagu (cognate)
← English lay#Etymology_2 (link)
← Ancient Greek λάκκος (cognate)
← Proto-Indo-European *lókus (inherited)
← Proto-Italic *lakus (inherited)

→ English lay (cognate)
→ English lacuna (mention)
→ English lacustrine (mention)
→ English cunette (mention)
→ English Ontario Lacus (mention)
→ Aragonese laco (inherited)
→ Old English lagu (cognate)
→ Old English lacu (mention)
→ Asturian llagu (inherited)
→ Catalan llac (inherited)
→ German Interlaken (mention)
→ Dalmatian lac (inherited)
→ Emilian lèg (inherited)
→ Spanish lago (inherited)
→ Finnish lakustrinen (derived)
→ French lac (inherited)
→ Old French lac (borrowed)
→ Old French lac (cognate)
→ Old French lai (inherited)
→ Franco-Provençal lac (inherited)
→ Friulian lâc (inherited)
→ Irish loch (cognate)
→ Galician lago (inherited)
→ Galician lagar (derived)
→ Galician lagoa (derived)
→ Ancient Greek λάκκος (cognate)
→ Ido lago (derived)
→ Icelandic lögur (cognate)
→ Italian lago (inherited)
→ Latin lama (cognate)
→ Latin lacuna (mention)
→ Latin lacusta (mention)
→ Latin stagnum (link)
→ Latin Sublaqueum (affix)
→ Maltese lag (derived)
→ Translingual lacus lacrimalis (derived)
→ Norwegian Bokmål låg (cognate)
→ Dutch lagune (mention)
→ Norwegian Nynorsk log (cognate)
→ Old Norse lǫgr (cognate)
→ Norman lac (inherited)
→ Portuguese lago (inherited)
→ Portuguese lagar (inherited)
→ Portuguese lagoa (mention)
→ Romansch lag (inherited)