突(つ)っ張(ぱ)るto support, to become stiff, to become taut, to thrust (one's opponent), to stick to (one's opinion), to insist on

首筋(くびすじ)が突(つ)っ張(ぱ)っていて痛(いた)いです。

My neck is stiff and hurts. {to support, to become stiff, to become taut, to thrust (one's opponent), to stick to (one's opinion), to insist on}

先生(せんせい)が突(つ)っ張(ぱ)っている学生(がくせい)を注意(ちゅうい)しました。

The teacher warned the student who was being obstinate. {to support, to become stiff, to become taut, to thrust (one's opponent), to stick to (one's opinion), to insist on}

足(あし)の筋肉(きんにく)が突(つ)っ張(ぱ)っていたのでストレッチをしました。

I did some stretching because my leg muscles were tense. {to support, to become stiff, to become taut, to thrust (one's opponent), to stick to (one's opinion), to insist on}

糊(のり)が効(き)きすぎると、浴衣(ゆかた)がピンと不自然(ふしぜん)に突(つ)っ張(ぱ)ってしまうとか。

If the starch is too strong, the yukata might become unnaturally stiff and tight. {to support, to become stiff, to become taut, to thrust (one's opponent), to stick to (one's opinion), to insist on}

顔(かお)が突(つ)っ張(ぱ)っているという点(てん)から考(かんが)えるとここは相当(そうとう)寒(さむ)いのだろう。

Considering the fact that my face feels tight, it must be quite cold here. {to support, to become stiff, to become taut, to thrust (one's opponent), to stick to (one's opinion), to insist on}