1To be sticky; to become tacky so that something clings to a surface (e.g., due to sweat or oil).
夏は汗でシャツがべたつくのが嫌だ。
I hate how my shirt gets sticky with sweat in summer.
手が油でべたつくから、洗ってきてください。
My hands are sticky with oil; please go wash them.
タイルに接着剤がついて、べたついている。
Adhesive is on the tile and it's sticky.
2To be close together or cling closely (people or objects); to stick to someone or something closely.
子どもが母親にべた付いて離れようとしない。
The child clings to his mother and won't let go.
広告がページにべた付いて見づらくなっている。
Ads are stuck all over the page, making it hard to read.