This is the 469th most frequent Hebrew word.
ים
Sea or ocean.
'ים' here means 'sea' and refers to a large body of water.
אני אוהב לראות את הים בקיץ.
I love watching the sea in the summer.
'ים' (though written similarly) is a suffix to form the plural of 'מסמך', which means documents.
במדע, מודדים דברים עם כלים מדויקים במסמך ים.
In science, we measure things with precise tools in documents.
'ים' in this context still refers to 'sea' but emphasizes geographical locations and surrounding areas.