The Navajo word lą’í is similar to t’óó ahayóí in that they both refer to a large amount.

Lą’í is similar in sound to lą́’ąą’, which is used as a casual “yep” or “alright then” (in a dismissive manner). It’s important to distinguish between the two.

A common usage is “lą’í nááhai” or “many years”. In a similar vein is “lą’í nááhaiídą́ą́’” which you’ll recognize as “many years ago”.