弾(はじ)くto flip, to snap, to flick, to repel, to use (an abacus), to calculate, to strum, to pluck the strings (of a guitar, etc.)

そろばんを弾(はじ)いて計算(けいさん)をする。

Play the abacus and do the calculation. {to flip, to snap, to flick, to repel, to use (an abacus), to calculate, to strum, to pluck the strings (of a guitar, etc.)}

水(みず)をよく弾(はじ)くレインコートが欲(ほ)しいです。

I want a raincoat that repels water well. {to flip, to snap, to flick, to repel, to use (an abacus), to calculate, to strum, to pluck the strings (of a guitar, etc.)}

先生(せんせい)：「音(おと)を出(だ)すために、指先(ゆびさき)でギターの弦(げん)を弾(はじ)きましょう。」

Teacher: 'In order to make a sound, let's pluck the guitar strings with our fingertips.' {to flip, to snap, to flick, to repel, to use (an abacus), to calculate, to strum, to pluck the strings (of a guitar, etc.)}

沢山(たくさん)練習(れんしゅう)をしたものの、指(ゆび)を弾(はじ)いて音(おと)を出(だ)せるようにはならなかった。

Despite practicing a lot, I couldn't manage to produce sound by plucking the strings. {to flip, to snap, to flick, to repel, to use (an abacus), to calculate, to strum, to pluck the strings (of a guitar, etc.)}

家庭(かてい)科(か)の先生(せんせい)によると、油(あぶら)は水(みず)を弾(はじ)いてしまうのでその二(ふた)つは混(ま)ざらないとか。

According to the home economics teacher, oil repels water so the two do not mix. {to flip, to snap, to flick, to repel, to use (an abacus), to calculate, to strum, to pluck the strings (of a guitar, etc.)}